diff --git a/app/assets/javascripts/bootstrap-dropdown-submenu.js b/app/assets/javascripts/bootstrap-dropdown-submenu.js
index 10809c02..38ad3854 100644
--- a/app/assets/javascripts/bootstrap-dropdown-submenu.js
+++ b/app/assets/javascripts/bootstrap-dropdown-submenu.js
@@ -1,6 +1,6 @@
 $(document).on('turbolinks:load', function() {
 
-  var subMenusSelector = 'ul.dropdown-menu [data-toggle=dropdown]';
+  var subMenusSelector = 'ul.dropdown-menu [data-bs-toggle=dropdown]';
 
   function openSubMenu(event) {
     if (this.pathname === '/') {
diff --git a/app/assets/javascripts/codeharbor_link.js b/app/assets/javascripts/codeharbor_link.js
index 4cd49ece..fdf42859 100644
--- a/app/assets/javascripts/codeharbor_link.js
+++ b/app/assets/javascripts/codeharbor_link.js
@@ -1,5 +1,5 @@
 $(document).on('turbolinks:load', function() {
-    $('[data-toggle="tooltip"]').tooltip();
+    $('[data-bs-toggle="tooltip"]').tooltip();
     if($.isController('codeharbor_links')) {
         if ($('.edit_codeharbor_link, .new_codeharbor_link').isPresent()) {
 
diff --git a/app/assets/javascripts/editor.js b/app/assets/javascripts/editor.js
index 465e2f49..6dc79b7f 100644
--- a/app/assets/javascripts/editor.js
+++ b/app/assets/javascripts/editor.js
@@ -15,12 +15,9 @@ $(document).on('turbolinks:load', function(event) {
   );
 
   if ($('#editor').isPresent() && CodeOceanEditor && event.originalEvent.data.url.includes("/implement")) {
-    if (CodeOceanEditor.isBrowserSupported()) {
-      $('#alert').hide();
-      // This call will (amon other things) initializeEditors and load the content except for the last line
-      // It must not be called during page navigation. Otherwise, content will be duplicated!
-      // Search for insertLines and Turbolinks reload / cache control
-      CodeOceanEditor.initializeEverything();
-    }
+    // This call will (amon other things) initializeEditors and load the content except for the last line
+    // It must not be called during page navigation. Otherwise, content will be duplicated!
+    // Search for insertLines and Turbolinks reload / cache control
+    CodeOceanEditor.initializeEverything();
   }
 });
diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index b07341ae..d242e64b 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -78,7 +78,7 @@ var CodeOceanEditor = {
         if ($('#output-' + index).isPresent()) {
             return $('#output-' + index);
         } else {
-            var element = $('<pre class="mt-2">').attr('id', 'output-' + index);
+            var element = $('<pre class="mb-2">').attr('id', 'output-' + index);
             $('#output').append(element);
             return element;
         }
@@ -235,10 +235,20 @@ var CodeOceanEditor = {
         window.dispatchEvent(new Event('resize'));
     },
 
-    resizeParentOfAceEditor: function (element) {
+    resizeSidebars: function () {
+        $('#content-left-sidebar').height(this.calculateEditorHeight('#content-left-sidebar', false));
+        $('#content-right-sidebar').height(this.calculateEditorHeight('#content-right-sidebar', false));
+    },
+
+    calculateEditorHeight: function (element, considerStatusbar) {
+        let bottom = considerStatusbar ? ($('#statusbar').height() || 0) : 0;
         // calculate needed size: window height - position of top of ACE editor - height of autosave label below editor - 5 for bar margins
-        var windowHeight = window.innerHeight - $(element).offset().top - ($('#statusbar').height() || 0) - 5;
-        $(element).parent().height(windowHeight);
+        return window.innerHeight - $(element).offset().top - bottom - 5;
+    },
+
+    resizeParentOfAceEditor: function (element) {
+        const editorHeight = this.calculateEditorHeight(element, true);
+        $(element).parent().height(editorHeight);
     },
 
     initializeEditors: function (own_solution = false) {
@@ -259,6 +269,7 @@ var CodeOceanEditor = {
             // Resize frame on window size change
             $(window).resize(function () {
                 this.resizeParentOfAceEditor(element);
+                this.resizeSidebars();
             }.bind(this));
 
             var editor = ace.edit(element);
@@ -390,6 +401,7 @@ var CodeOceanEditor = {
             tipButton.on('click', this.handleSideBarToggle.bind(this));
         }
         $('#sidebar').on('transitionend', this.resizeAceEditors.bind(this));
+        $('#sidebar').on('transitionend', this.resizeSidebars.bind(this));
     },
 
     handleSideBarToggle: function () {
@@ -433,12 +445,12 @@ var CodeOceanEditor = {
         button.prop('disabled', true);
         button.on('click', function () {
             $('#rfc_intervention_text').hide()
-            $('#comment-modal').modal('show');
+            new bootstrap.Modal($('#comment-modal')).show();
         });
 
         $('#askForCommentsButton').on('click', this.requestComments.bind(this));
         $('#closeAskForCommentsButton').on('click', function () {
-            $('#comment-modal').modal('hide');
+            bootstrap.Modal.getInstance($('#comment-modal')).hide();
         });
 
         setTimeout(function () {
@@ -475,12 +487,6 @@ var CodeOceanEditor = {
         return this.isActiveFileExecutable() && ['teacher_defined_test', 'user_defined_test', 'teacher_defined_linter'].includes(this.active_frame.data('role'));
     },
 
-    isBrowserSupported: function () {
-        //  websockets are used for run, score and test
-        // Also exclude IE and IE 11
-        return Modernizr.websockets && window.navigator.userAgent.indexOf("MSIE") <= 0 && !navigator.userAgent.match(/Trident\/7\./);
-    },
-
     populateCard: function (card, result, index) {
         card.addClass(this.getCardClass(result));
         card.find('.card-title .filename').text(result.filename);
@@ -778,7 +784,7 @@ var CodeOceanEditor = {
         event.preventDefault();
         this.createSubmission('#create-file', null, function (response) {
             $('#code_ocean_file_context_id').val(response.id);
-            $('#modal-file').modal('show');
+            new bootstrap.Modal($('#modal-file')).show();
         }.bind(this));
     },
 
@@ -786,6 +792,7 @@ var CodeOceanEditor = {
         $('#toggle-sidebar-output').on('click', this.hideOutputBar.bind(this));
         $('#toggle-sidebar-output-collapsed').on('click', this.showOutputBar.bind(this));
         $('#output_sidebar').on('transitionend', this.resizeAceEditors.bind(this));
+        $('#output_sidebar').on('transitionend', this.resizeSidebars.bind(this));
     },
 
     showOutputBar: function () {
@@ -801,7 +808,7 @@ var CodeOceanEditor = {
     },
 
     initializeSideBarTooltips: function () {
-        $('[data-toggle="tooltip"]').tooltip()
+        $('[data-bs-toggle="tooltip"]').tooltip()
     },
 
     initializeDescriptionToggle: function () {
@@ -809,12 +816,13 @@ var CodeOceanEditor = {
         $('a#toggle').on('click', this.toggleDescriptionCard.bind(this));
     },
 
-    toggleDescriptionCard: function () {
+    toggleDescriptionCard: function (event) {
         $('#description-card').toggleClass('description-card-collapsed').toggleClass('description-card');
         $('#description-symbol').toggleClass('fa-chevron-down').toggleClass('fa-chevron-right');
         var toggle = $('a#toggle');
         toggle.text(toggle.text() == toggle.data('hide') ? toggle.data('show') : toggle.data('hide'));
         this.resizeAceEditors();
+        this.resizeSidebars();
         event.preventDefault();
     },
 
@@ -871,7 +879,7 @@ var CodeOceanEditor = {
                             if (editor.data('tips-interventions')) {
                                 const modal = $('#tips-intervention-modal');
                                 modal.find('.modal-footer').html(I18n.t("exercises.implement.intervention.explanation", {duration: Math.round(percentile75 / 60)}));
-                                modal.modal('show');
+                                new bootstrap.Modal(modal).show();
                                 $.ajax({
                                     data: {
                                         intervention_type: 'TipsIntervention'
@@ -883,7 +891,7 @@ var CodeOceanEditor = {
                             } else if (editor.data('break-interventions')) {
                                 const modal = $('#break-intervention-modal');
                                 modal.find('.modal-footer').html(I18n.t("exercises.implement.intervention.explanation", {duration: Math.round(percentile75 / 60)}));
-                                modal.modal('show');
+                                new bootstrap.Modal(modal).show();
                                 $.ajax({
                                     data: {
                                         intervention_type: 'BreakIntervention'
@@ -902,7 +910,7 @@ var CodeOceanEditor = {
                                     modal.on('hidden.bs.modal', function () {
                                         modal.find('.modal-footer').text('');
                                     });
-                                    modal.modal('show');
+                                    new bootstrap.Modal(modal).show();
                                     $.ajax({
                                         data: {
                                             intervention_type: 'QuestionIntervention'
@@ -945,7 +953,6 @@ var CodeOceanEditor = {
         CodeOceanEditor.editors = [];
         this.initializeRegexes();
         this.initializeCodePilot();
-        $('.score, #development-environment').show();
         this.configureEditors();
         this.initializeEditors();
         this.initializeEventHandlers();
@@ -961,6 +968,7 @@ var CodeOceanEditor = {
         this.renderScore();
         this.showFirstFile();
         this.resizeAceEditors();
+        this.resizeSidebars();
         this.initializeDeadlines();
         CodeOceanEditorTips.initializeEventHandlers();
 
diff --git a/app/assets/javascripts/editor/participantsupport.js.erb b/app/assets/javascripts/editor/participantsupport.js.erb
index 77d2138b..db801aeb 100644
--- a/app/assets/javascripts/editor/participantsupport.js.erb
+++ b/app/assets/javascripts/editor/participantsupport.js.erb
@@ -4,7 +4,7 @@ CodeOceanEditorFlowr = {
     '<div class="card mb-2">' +
       '<div id="{{headingId}}" role="tab" class="card-header">' +
         '<div class="card-title mb-0">' +
-          '<a class="collapsed" data-toggle="collapse" data-parent="#flowrHint" href="#{{collapseId}}" aria-expanded="false" aria-controls="{{collapseId}}">' +
+          '<a class="collapsed" data-bs-toggle="collapse" data-bs-parent="#flowrHint" href="#{{collapseId}}" aria-expanded="false" aria-controls="{{collapseId}}">' +
             '<div class="clearfix" role="button">' +
               '<i class="fa-solid" aria-hidden="true"></i>' +
               '<span>' +
@@ -14,7 +14,7 @@ CodeOceanEditorFlowr = {
         '</div>' +
       '</div>' +
       '<div id="{{collapseId}}" role="tabpanel" aria-labelledby="{{headingId}}" class="card card-collapse collapse">' +
-        '<div class="card-body"></div>' +
+        '<div class="card-body d-grid gap-2"></div>' +
       '</div>' +
     '</div>',
 
@@ -93,7 +93,7 @@ CodeOceanEditorFlowr = {
 
         var body = resultTile.find('.card-body');
         body.html(result.body);
-        body.append('<a target="_blank" href="' + questionUrl + '" class="btn btn-primary btn-block">' +
+        body.append('<a target="_blank" href="' + questionUrl + '" class="btn btn-primary">' +
           '<%= I18n.t('exercises.implement.flowr.go_to_question') %></a>');
         body.find('.btn').on('click', CodeOceanEditor.createEventHandler('editor_flowr_click_question', questionUrl));
 
@@ -112,7 +112,7 @@ CodeOceanEditorCodePilot = {
   QaApiOutputBuffer: {'stdout': '', 'stderr': ''},
 
   initializeCodePilot: function () {
-    if ($('#questions-column').isPresent() && (typeof QaApi != 'undefined') && QaApi.isBrowserSupported()) {
+    if ($('#questions-column').isPresent() && (typeof QaApi != 'undefined')) {
       $('#editor-column').addClass('col-md-10').removeClass('col-md-12');
       $('#questions-column').addClass('col-md-2');
 
@@ -161,7 +161,7 @@ CodeOceanEditorRequestForComments = {
 
     this.createSubmission($('#requestComments'), null, createRequestForComments.bind(this));
 
-    $('#comment-modal').modal('hide');
+    bootstrap.Modal.getInstance($('#comment-modal')).hide();
     $('#question').val('');
     // we disabled the button to prevent that the user spams RFCs, but decided against this now.
     //var button = $('#requestComments');
diff --git a/app/assets/javascripts/editor/turtle.js b/app/assets/javascripts/editor/turtle.js
index e6463ee4..d388f375 100644
--- a/app/assets/javascripts/editor/turtle.js
+++ b/app/assets/javascripts/editor/turtle.js
@@ -37,15 +37,16 @@ CodeOceanEditorTurtle = {
   },
 
   showCanvas: function () {
-    if ($('#turtlediv').isPresent() && this.turtlecanvas.hasClass('d-none')) {
-      this.turtlecanvas.removeClass('d-none');
+    const turtlediv = $('#turtlediv');
+    if (turtlediv.isPresent() && turtlediv.hasClass('d-none')) {
+      turtlediv.removeClass('d-none');
     }
   },
 
   hideCanvas: function () {
-    const turtlecanvas = $('#turtlecanvas');
-    if ($('#turtlediv').isPresent() && !turtlecanvas.hasClass('d-none')) {
-      turtlecanvas.addClass('d-none');
+    const turtlediv = $('#turtlediv');
+    if (turtlediv.isPresent() && !turtlediv.hasClass('d-none')) {
+      turtlediv.addClass('d-none');
     }
   }
 
diff --git a/app/assets/javascripts/exercise_collections.js.erb b/app/assets/javascripts/exercise_collections.js.erb
index 6c8602f7..d0aad22e 100644
--- a/app/assets/javascripts/exercise_collections.js.erb
+++ b/app/assets/javascripts/exercise_collections.js.erb
@@ -187,7 +187,7 @@ $(document).on('turbolinks:load', function() {
         for (var i = 0; i < selectedExercises.length; i++) {
           addExercise(selectedExercises[i].value, selectedExercises[i].label);
         }
-        $('#add-exercise-modal').modal('hide')
+        bootstrap.Modal.getInstance($('#add-exercise-modal')).hide();
         updateExerciseList();
         addExercisesForm.find('select').val('').trigger("chosen:updated");
       });
diff --git a/app/assets/javascripts/exercises.js.erb b/app/assets/javascripts/exercises.js.erb
index 9a5f0378..a91586dd 100644
--- a/app/assets/javascripts/exercises.js.erb
+++ b/app/assets/javascripts/exercises.js.erb
@@ -123,7 +123,7 @@ $(document).on('turbolinks:load', function () {
     var buildCheckboxes = function () {
         $('tbody tr').each(function (index, element) {
             var td = $('td.public', element);
-            var checkbox = $('<input>', {
+            var checkbox = $('<input class="form-check-input">', {
                 checked: td.data('value'),
                 type: 'checkbox'
             });
@@ -225,9 +225,9 @@ $(document).on('turbolinks:load', function () {
             const tip = {id: id, title: title}
             const template =
                 '<div class="list-group-item d-block" data-tip-id=' + tip.id + ' data-id="">' +
-                '<span class="fa-solid fa-bars mr-3"></span>' + tip.title +
-                '<a class="fa-regular fa-eye ml-2" href="/tips/' + tip.id + '" target="_blank"></a>' +
-                '<a class="fa-solid fa-xmark ml-2 remove-tip" href="#""></a>' +
+                '<span class="fa-solid fa-bars me-3"></span>' + tip.title +
+                '<a class="fa-regular fa-eye ms-2" href="/tips/' + tip.id + '" target="_blank"></a>' +
+                '<a class="fa-solid fa-xmark ms-2 remove-tip" href="#""></a>' +
                 '<div class="list-group nested-sortable-list"></div>' +
                 '</div>';
             const tipList = $('#tip-list').append(template);
@@ -243,7 +243,7 @@ $(document).on('turbolinks:load', function () {
             for (let i = 0; i < selectedTips.length; i++) {
                 addTip(selectedTips[i].value, selectedTips[i].label);
             }
-            $('#add-tips-modal').modal('hide')
+            bootstrap.Modal.getInstance($('#add-tips-modal')).hide();
             updateTipsJSON();
             chosenInputTips.val('').trigger("chosen:updated");
         });
@@ -328,10 +328,7 @@ $(document).on('turbolinks:load', function () {
     var observeExportButtons = function () {
         $('.export-start').on('click', function (e) {
             e.preventDefault();
-            $('#export-modal').modal({
-                height: 250
-            });
-            $('#export-modal').modal('show');
+            new bootstrap.Modal($('#export-modal')).show();
             exportExerciseStart($(this).data().exerciseId);
         });
         $('body').on('click', '.export-retry-button', function () {
@@ -382,7 +379,7 @@ $(document).on('turbolinks:load', function () {
                 if (response.status == 'success') {
                     $messageDiv.addClass('export-success');
                     setTimeout((function () {
-                        $('#export-modal').modal('hide');
+                        bootstrap.Modal.getInstance($('#export-modal')).hide();
                         $messageDiv.html('').removeClass('export-success');
                     }), 3000);
                 } else {
@@ -396,7 +393,7 @@ $(document).on('turbolinks:load', function () {
     };
 
     var overrideTextareaTabBehavior = function () {
-        $('.form-group textarea[name$="[content]"]').on('keydown', function (event) {
+        $('.mb-3 textarea[name$="[content]"]').on('keydown', function (event) {
             if (event.which === TAB_KEY_CODE) {
                 event.preventDefault();
                 insertTabAtCursor($(this));
diff --git a/app/assets/javascripts/forms.js b/app/assets/javascripts/forms.js
index 7e469455..2be40eba 100644
--- a/app/assets/javascripts/forms.js
+++ b/app/assets/javascripts/forms.js
@@ -9,7 +9,7 @@ $(document).on('turbolinks:load', function() {
     event.preventDefault();
 
     if (!$(this).hasClass('disabled')) {
-      var parent = $(this).parents('.form-group');
+      var parent = $(this).parents('.mb-3');
       var original_input = parent.find('.original-input');
       var alternative_input = parent.find('.alternative-input');
 
diff --git a/app/assets/javascripts/pagedown/markdown.editor.js.erb b/app/assets/javascripts/pagedown/markdown.editor.js.erb
index 459d7cfa..8330a85c 100644
--- a/app/assets/javascripts/pagedown/markdown.editor.js.erb
+++ b/app/assets/javascripts/pagedown/markdown.editor.js.erb
@@ -1018,7 +1018,7 @@
                     text = 'http://' + text;
             }
 
-            $(dialog).modal('hide');
+            bootstrap.Modal.getInstance($(dialog)).hide();
 
             callback(text);
             return false;
@@ -1032,7 +1032,7 @@
             //   <div class="modal-dialog">
             //      <div class="modal-content">
             //          <div class="modal-header">
-            //              <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
+            //              <button type="button" class="close" data-bs-dismiss="modal" aria-hidden="true">&times;</button>
             //              <h3 class="modal-title">Modal title</h3>
             //          </div>
             //          <div class="modal-body">
@@ -1062,7 +1062,7 @@
             // The header.
             var header = doc.createElement("div");
             header.className = "modal-header";
-            header.innerHTML = '<h3 class="modal-title">'+title+'</h3> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>';
+            header.innerHTML = '<h3 class="modal-title">'+title+'</h3> <button type="button" class="btn-close" data-bs-dismiss="modal" aria-hidden="true"></button>';
             dialogContent.appendChild(header);
 
             // The body.
@@ -1082,7 +1082,7 @@
 
             // The input text box
             var formGroup = doc.createElement("div");
-            formGroup.className = "form-group";
+            formGroup.className = "mb-3";
             form.appendChild(formGroup);
 
             var label = doc.createElement("label");
@@ -1144,15 +1144,15 @@
                 range.select();
             }
 
-            $(dialog).on('shown', function () {
+            $(dialog).on('shown.bs.modal', function () {
                 input.focus();
             });
 
-            $(dialog).on('hidden', function () {
+            $(dialog).on('hidden.bs.modal', function () {
                 dialog.parentNode.removeChild(dialog);
             });
 
-            $(dialog).modal()
+            new bootstrap.Modal($(dialog)).show();
 
         }, 0);
     };
@@ -1360,8 +1360,8 @@
                 button.appendChild(buttonImage);
                 button.id = id + postfix;
                 button.title = title;
-                button.setAttribute("data-toggle", "tooltip");
-                button.setAttribute("data-placement", "top");
+                button.setAttribute("data-bs-toggle", "tooltip");
+                button.setAttribute("data-bs-placement", "top");
                 if (textOp)
                     button.textOp = textOp;
                 setupButton(button, true);
@@ -1416,7 +1416,7 @@
 
             if (helpOptions) {
                 var group5 = makeGroup(5);
-                group5.className = group5.className + " ml-auto";
+                group5.className = group5.className + " ms-auto";
                 var helpButton = document.createElement("button");
                 var helpButtonImage = document.createElement("i");
                 helpButtonImage.className = "m-1 fa-solid fa-info";
@@ -1424,8 +1424,8 @@
                 helpButton.className = "btn btn-info btn-sm";
                 helpButton.id = "wmd-help-button" + postfix;
                 helpButton.isHelp = true;
-                helpButton.setAttribute("data-toggle", "tooltip");
-                helpButton.setAttribute("data-placement", "top");
+                helpButton.setAttribute("data-bs-toggle", "tooltip");
+                helpButton.setAttribute("data-bs-placement", "top");
                 helpButton.title = helpOptions.title || defaultHelpHoverTitle;
                 helpButton.onclick = helpOptions.handler;
 
diff --git a/app/assets/javascripts/pagedown/pagedown.js.erb b/app/assets/javascripts/pagedown/pagedown.js.erb
index cada3497..3581b894 100644
--- a/app/assets/javascripts/pagedown/pagedown.js.erb
+++ b/app/assets/javascripts/pagedown/pagedown.js.erb
@@ -32,7 +32,7 @@ createPagedownEditor = function( selector, context ) {
 
         const editor = new Markdown.Editor(converter, attr, help);
         editor.run();
-        $('[data-toggle="tooltip"]').tooltip();
+        $('[data-bs-toggle="tooltip"]').tooltip();
         return $(input).data('is_rendered', true);
     });
 };
diff --git a/app/assets/stylesheets/base.css.scss b/app/assets/stylesheets/base.css.scss
index 1488c4f9..f0419c32 100644
--- a/app/assets/stylesheets/base.css.scss
+++ b/app/assets/stylesheets/base.css.scss
@@ -12,6 +12,15 @@ h1, h2, h3, h4, h5, h6 {
   color: rgba(70, 70, 70, 1);
 }
 
+a:not(.dropdown-item, .dropdown-toggle, .dropdown-link, .btn, .page-link), .btn-link {
+  text-decoration: none;
+
+  &:hover {
+    text-decoration: underline;
+
+  }
+}
+
 i.fa-solid, i.fa-regular, i.fa-solid {
   margin-right: 0.5em;
 }
@@ -51,13 +60,17 @@ span.caret {
 .navbar {
   -webkit-font-smoothing: antialiased;
   font-weight: 500;
+  font-size: 0.85rem;
+  .dropdown-item {
+    padding: 1rem 1.5rem;
+  }
 }
 
 .attribute-row + .attribute-row {
   margin-top: 0.5em;
 }
 
-.badge-pill {
+.rounded-pill {
   font-size: 100%;
   font-weight: 500;
 }
diff --git a/app/assets/stylesheets/bootstrap-dropdown-submenu.css.scss b/app/assets/stylesheets/bootstrap-dropdown-submenu.css.scss
index ceb88020..ce930c28 100644
--- a/app/assets/stylesheets/bootstrap-dropdown-submenu.css.scss
+++ b/app/assets/stylesheets/bootstrap-dropdown-submenu.css.scss
@@ -29,11 +29,11 @@
   border-left-color: #ffffff;
 }
 
-.dropdown-submenu.float-left {
+.dropdown-submenu.float-start {
   float: none;
 }
 
-.dropdown-submenu.float-left > .dropdown-menu {
+.dropdown-submenu.float-start > .dropdown-menu {
   left: -100%;
   margin-left: 10px;
   -webkit-border-radius: 6px 0 6px 6px;
diff --git a/app/assets/stylesheets/editor.css.scss b/app/assets/stylesheets/editor.css.scss
index 49141816..fc564439 100644
--- a/app/assets/stylesheets/editor.css.scss
+++ b/app/assets/stylesheets/editor.css.scss
@@ -48,10 +48,6 @@ button i.fa-spin {
   vertical-align: bottom;
 }
 
-#development-environment {
-  display: none;
-}
-
 #dummy {
   display: none;
 }
@@ -203,8 +199,8 @@ button i.fa-spin {
   visibility: visible;
 }
 
-.enforce-big-top-margin {
-  margin-top: 15px !important;
+.enforce-big-bottom-margin {
+  margin-bottom: 15px !important;
 }
 
 .enforce-bottom-margin {
diff --git a/app/assets/stylesheets/exercises.css.scss b/app/assets/stylesheets/exercises.css.scss
index 75a98edf..02e472fb 100644
--- a/app/assets/stylesheets/exercises.css.scss
+++ b/app/assets/stylesheets/exercises.css.scss
@@ -40,11 +40,11 @@ input[type='file'] {
   }
 }
 
-[data-toggle="collapse"] .fa-solid:before {
+[data-bs-toggle="collapse"] .fa-solid:before {
   content: "\f139";
 }
 
-[data-toggle="collapse"].collapsed .fa-solid:before {
+[data-bs-toggle="collapse"].collapsed .fa-solid:before {
   content: "\f13a";
 }
 
diff --git a/app/assets/stylesheets/forms.css.scss b/app/assets/stylesheets/forms.css.scss
index 62613e8e..fd797034 100644
--- a/app/assets/stylesheets/forms.css.scss
+++ b/app/assets/stylesheets/forms.css.scss
@@ -23,12 +23,6 @@
     margin-bottom: 1em;
   }
 
-  .form-group {
-    &:not(:last-child) {
-      margin-right: 1em;
-    }
-  }
-
   input, select {
     min-width: 200px !important;
   }
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 8ca2997f..b5391f8e 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -22,7 +22,7 @@ module ApplicationHelper
   end
 
   def label_column(label)
-    tag.div(class: 'col-sm-3') do
+    tag.div(class: 'col-md-3') do
       tag.strong do
         I18n.translation_present?("activerecord.attributes.#{label}") ? t("activerecord.attributes.#{label}") : t(label)
       end
@@ -72,7 +72,7 @@ module ApplicationHelper
   end
 
   def value_column(value)
-    tag.div(class: 'col-sm-9') do
+    tag.div(class: 'col-md-9') do
       block_given? ? yield : symbol_for(value)
     end
   end
diff --git a/app/javascript/application.js b/app/javascript/application.js
index 04289fb2..9da4992f 100644
--- a/app/javascript/application.js
+++ b/app/javascript/application.js
@@ -10,12 +10,13 @@
 // JS
 import 'jquery';
 import 'jquery-ujs'
-import 'bootstrap/dist/js/bootstrap.bundle.min';
+import * as bootstrap from 'bootstrap/dist/js/bootstrap.bundle';
 import 'chosen-js/chosen.jquery';
 import 'jstree';
 import 'underscore';
 import 'd3';
 import '@sentry/browser';
+window.bootstrap = bootstrap; // Publish underscore's `_` in global namespace
 window._ = _; // Publish underscore's `_` in global namespace
 window.d3 = d3; // Publish d3 in global namespace
 window.Sentry = Sentry; // Publish sentry in global namespace
diff --git a/app/views/application/_breadcrumbs_and_title.html.slim b/app/views/application/_breadcrumbs_and_title.html.slim
index 1be2f47b..5829ec88 100644
--- a/app/views/application/_breadcrumbs_and_title.html.slim
+++ b/app/views/application/_breadcrumbs_and_title.html.slim
@@ -18,14 +18,17 @@
 
 - title = "#{active_action} - #{application_name}"
 - content_for :breadcrumbs do
-  .container
-    ul.breadcrumb
+  .container.mb-4
+    ul.breadcrumb.bg-light.px-3.py-2
       - if root_element.present?
-        li.breadcrumb-item = root_element
+        li.breadcrumb-item.small
+          = root_element
         - if current_element.present?
-          li.breadcrumb-item = current_element
+          li.breadcrumb-item.small
+            = current_element
           - title = "#{object} - #{title}"
         - else
           - title = "#{model.model_name.human(count: 2)} - #{title}"
-      li.breadcrumb-item.active = active_action
+      li.breadcrumb-item.active.small
+        = active_action
 - content_for :title, title
diff --git a/app/views/application/_flash.html.slim b/app/views/application/_flash.html.slim
index 046c58ea..2311318e 100644
--- a/app/views/application/_flash.html.slim
+++ b/app/views/application/_flash.html.slim
@@ -4,5 +4,4 @@
       - flash_mapping = {'alert' => 'warning', 'notice' => 'success'}
       div.alert.flash class="alert-#{flash_mapping.fetch(severity, severity)} alert-dismissible fade show"
         p.mb-0 id="flash-#{severity}" == flash[severity]
-        button type="button" class="close" data-dismiss="alert" aria-label="Close"
-          span.text-white aria-hidden="true" &times;
+        button.btn-close type="button" data-bs-dismiss="alert" aria-label="Close"
diff --git a/app/views/application/_locale_selector.html.slim b/app/views/application/_locale_selector.html.slim
index dd2e4787..0401e98d 100644
--- a/app/views/application/_locale_selector.html.slim
+++ b/app/views/application/_locale_selector.html.slim
@@ -1,5 +1,5 @@
 li.nav-item.dropdown
-  a.nav-link.dropdown-toggle.mx-3 data-toggle='dropdown' href='#'
+  a.nav-link.dropdown-toggle.mx-3 data-bs-toggle='dropdown' href='#'
     = t("locales.#{I18n.locale}")
     span.caret
   ul.dropdown-menu.p-0.mt-1 role='menu'
diff --git a/app/views/application/_navigation.html.slim b/app/views/application/_navigation.html.slim
index c28939d5..831db2bc 100644
--- a/app/views/application/_navigation.html.slim
+++ b/app/views/application/_navigation.html.slim
@@ -1,7 +1,7 @@
 - if current_user.try(:admin?) or current_user.try(:teacher?)
   ul.nav.navbar-nav
     li.nav-item.dropdown
-      a.nav-link.dropdown-toggle.mx-3 data-toggle='dropdown' href='#'
+      a.nav-link.dropdown-toggle.mx-3 data-bs-toggle='dropdown' href='#'
         = t('shared.administration')
         span.caret
       ul.dropdown-menu.p-0.mt-1 role='menu'
diff --git a/app/views/application/_navigation_submenu.html.slim b/app/views/application/_navigation_submenu.html.slim
index fc4c9dec..fa66d605 100644
--- a/app/views/application/_navigation_submenu.html.slim
+++ b/app/views/application/_navigation_submenu.html.slim
@@ -1,7 +1,7 @@
 - if models.any? { |model| policy(model).index? }
   li.dropdown-submenu
     - link = link.nil? ? "#" : link
-    a.dropdown-item.dropdown-toggle href=link data-toggle="dropdown" = title
+    a.dropdown-item.dropdown-toggle href=link data-bs-toggle="dropdown" = title
     ul.dropdown-menu.p-0
       - models.each do |model|
         = render('navigation_collection_link', model: model, cached: true)
diff --git a/app/views/application/_session.html.slim b/app/views/application/_session.html.slim
index d14080eb..64973d6b 100644
--- a/app/views/application/_session.html.slim
+++ b/app/views/application/_session.html.slim
@@ -1,6 +1,6 @@
 - if current_user
   li.nav-item.dropdown
-    a.nav-link.dropdown-toggle data-toggle='dropdown' href='#'
+    a.nav-link.dropdown-toggle data-bs-toggle='dropdown' href='#'
       i.fa-solid.fa-user
       = current_user
       span.caret
diff --git a/app/views/code_ocean/files/_form.html.slim b/app/views/code_ocean/files/_form.html.slim
index bfdf2257..f1a556cf 100644
--- a/app/views/code_ocean/files/_form.html.slim
+++ b/app/views/code_ocean/files/_form.html.slim
@@ -1,19 +1,19 @@
 = form_for(CodeOcean::File.new) do |f|
-  .form-group
-    = f.label(:name, t('activerecord.attributes.file.name'))
+  .mb-3
+    = f.label(:name, t('activerecord.attributes.file.name'), class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:path, t('activerecord.attributes.file.path'))
+  .mb-3
+    = f.label(:path, t('activerecord.attributes.file.path'), class: 'form-label')
     | &nbsp;
     a.toggle-input data={text_initial: t('shared.new'), text_toggled: t('shared.back')} href='#' = t('shared.new')
     .original-input = f.select(:path, @paths, {}, class: 'form-control')
     = f.text_field(:path, class: 'alternative-input form-control', disabled: true)
-  .form-group
-    = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'))
+  .mb-3
+    = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'), class: 'form-label')
     = f.collection_select(:file_type_id, FileType.where(binary: false).order(:name), :id, :name, {selected: @exercise.execution_environment.file_type.try(:id)}, class: 'form-control')
   - if FileTemplate.any?
-    .form-group
-      = f.label(:file_template_id, t('activerecord.attributes.file.file_template_id'))
+    .mb-3
+      = f.label(:file_template_id, t('activerecord.attributes.file.file_template_id'), class: 'form-label')
       = f.collection_select(:file_template_id, FileTemplate.all.order(:name), :id, :name, {:include_blank => true}, class: 'form-control')
   = f.hidden_field(:context_id)
   .d-none#noTemplateLabel data-text=t('file_template.no_template_label')
diff --git a/app/views/codeharbor_links/_form.html.slim b/app/views/codeharbor_links/_form.html.slim
index f7b84ddc..6dd6cdb5 100644
--- a/app/views/codeharbor_links/_form.html.slim
+++ b/app/views/codeharbor_links/_form.html.slim
@@ -1,13 +1,13 @@
 = form_for(@codeharbor_link) do |f|
   = render('shared/form_errors', object: @codeharbor_link)
-  .form-group
-    = f.label(:push_url)
+  .mb-3
+    = f.label(:push_url, class: 'form-label')
     = f.text_field :push_url, data: {toggle: 'tooltip', placement: 'bottom'}, title: t('codeharbor_link.info.push_url'), class: 'form-control'
-  .form-group
-    = f.label(:check_uuid_url)
+  .mb-3
+    = f.label(:check_uuid_url, class: 'form-label')
     = f.text_field :check_uuid_url, data: {toggle: 'tooltip', placement: 'bottom'}, title: t('codeharbor_link.info.check_uuid_url'), class: 'form-control'
-  .form-group
-    = f.label(:api_key)
+  .mb-3
+    = f.label(:api_key, class: 'form-label')
     .input-group
       = f.text_field(:api_key, data: {toggle: 'tooltip', placement: 'bottom'}, title: t('codeharbor_link.info.api_key'), class: 'form-control api_key')
       .input-group-btn
@@ -15,5 +15,5 @@
   .actions
     = render('shared/submit_button', f: f, object: @codeharbor_link)
     - if @codeharbor_link.persisted?
-      = link_to(t('codeharbor_link.delete'), codeharbor_link_path(@codeharbor_link), data: {confirm: t('shared.confirm_destroy')}, method: :delete, class: 'btn btn-danger pull-right')
+      = link_to(t('codeharbor_link.delete'), codeharbor_link_path(@codeharbor_link), data: {confirm: t('shared.confirm_destroy')}, method: :delete, class: 'btn btn-danger float-end')
 
diff --git a/app/views/community_solutions/_form.html.slim b/app/views/community_solutions/_form.html.slim
index 05265aa9..a9d99548 100644
--- a/app/views/community_solutions/_form.html.slim
+++ b/app/views/community_solutions/_form.html.slim
@@ -1,6 +1,6 @@
 .exercise.clearfix
   div
-    span.badge.badge-pill.badge-primary.float-right.score
+    span.badge.rounded-pill.bg-primary.float-end.score
 
     h1 id="exercise-headline"
       i id="description-symbol" class=(@embed_options[:collapse_exercise_description] ? 'fa-solid fa-chevron-right' : 'fa-solid fa-chevron-down')
@@ -32,11 +32,11 @@
     h4
       = t('community_solutions.current_community_solution')
     #community-solution-editor.row
-      .pr-0 class=(@community_solution.exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3')
+      .pe-0 class=(@community_solution.exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3')
         .card.border-secondary
           .card-header.d-flex.justify-content-between.align-items-center.px-0.py-2
             .px-2 = I18n.t('exercises.editor_file_tree.file_root')
-          .card-body.pt-0.pr-0.pl-1.pb-1
+          .card-body.pt-0.pe-0.ps-1.pb-1
             #files data-entries=FileTree.new(@files).to_js_tree
       div class=(@community_solution.exercise.hide_file_tree ? 'col-sm-12' : 'col-sm-9')
         div.editor-col.col.p-0 id='frames'
@@ -44,16 +44,16 @@
             = render('exercises/editor_frame', exercise: @community_solution.exercise, file: file)
 
   .col-xl-6.container-fluid
-    div.bg-dark.h-100.float-left.row style="width: 1px"
+    div.bg-dark.h-100.float-start.row style="width: 1px"
     div
       h4
         = t('community_solutions.your_submission')
       #own-solution-editor.row
-        .pr-0 class=(@community_solution.exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3')
+        .pe-0 class=(@community_solution.exercise.hide_file_tree ? 'd-none col-sm-3' : 'col-sm-3')
           .card.border-secondary
             .card-header.d-flex.justify-content-between.align-items-center.px-0.py-2
               .px-2 = I18n.t('exercises.editor_file_tree.file_root')
-            .card-body.pt-0.pr-0.pl-1.pb-1
+            .card-body.pt-0.pe-0.ps-1.pb-1
               #own-files data-entries=FileTree.new(@own_files).to_js_tree
         div class=(@community_solution.exercise.hide_file_tree ? 'col-sm-12' : 'col-sm-9')
           div.editor-col.col.p-0 id='own-frames'
@@ -61,6 +61,6 @@
               = render('exercises/editor_frame', exercise: @community_solution.exercise, file: file, own_solution: true)
 #statusbar.visible.mt-2 style="height: 5em"
   p.text-center
-    = render('exercises/editor_button', classes: 'btn-lg btn-success ml-5 mr-3', data: {'data-url': community_solution_path(@community_solution), 'data-http-method': 'PUT', 'data-cause': 'change-community-solution', 'data-exercise-id': @community_solution.exercise.id}, icon: 'fa-solid fa-paper-plane', id: 'submit', label: t('community_solutions.change_community_solution'))
-    = render('exercises/editor_button', classes: 'btn-lg btn-secondary ml-5', data: {'data-url': community_solution_path(@community_solution), 'data-http-method': 'PUT', 'data-cause': 'accept-community-solution', 'data-exercise-id': @community_solution.exercise.id}, icon: 'fa-solid fa-check', id: 'accept', label: t('community_solutions.accept_community_solution'))
+    = render('exercises/editor_button', classes: 'btn-lg btn-success ms-5 me-3', data: {'data-url': community_solution_path(@community_solution), 'data-http-method': 'PUT', 'data-cause': 'change-community-solution', 'data-exercise-id': @community_solution.exercise.id}, icon: 'fa-solid fa-paper-plane', id: 'submit', label: t('community_solutions.change_community_solution'))
+    = render('exercises/editor_button', classes: 'btn-lg btn-secondary ms-5', data: {'data-url': community_solution_path(@community_solution), 'data-http-method': 'PUT', 'data-cause': 'accept-community-solution', 'data-exercise-id': @community_solution.exercise.id}, icon: 'fa-solid fa-check', id: 'accept', label: t('community_solutions.accept_community_solution'))
   button style="display:none" id="autosave" data-url=community_solution_path(@community_solution) data-http-method='PUT' data-cause='autosave-community-solution' data-exercise-id=@community_solution.exercise.id
diff --git a/app/views/consumers/_form.html.slim b/app/views/consumers/_form.html.slim
index f60a201c..ad6ad4e4 100644
--- a/app/views/consumers/_form.html.slim
+++ b/app/views/consumers/_form.html.slim
@@ -1,12 +1,12 @@
 = form_for(@consumer) do |f|
   = render('shared/form_errors', object: @consumer)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:oauth_key)
+  .mb-3
+    = f.label(:oauth_key, class: 'form-label')
     = f.text_field(:oauth_key, class: 'form-control', required: true)
-  .form-group
-    = f.label(:oauth_secret)
+  .mb-3
+    = f.label(:oauth_secret, class: 'form-label')
     = f.text_field(:oauth_secret, class: 'form-control', required: true)
   .actions = render('shared/submit_button', f: f, object: @consumer)
diff --git a/app/views/consumers/show.html.slim b/app/views/consumers/show.html.slim
index c355d819..9da38f3b 100644
--- a/app/views/consumers/show.html.slim
+++ b/app/views/consumers/show.html.slim
@@ -5,4 +5,4 @@ h1
 = row(label: 'consumer.name', value: @consumer.name)
 - %w[oauth_key oauth_secret].each do |attribute|
   = row(label: "consumer.#{attribute}") do
-    = content_tag(:input, nil, class: 'form-control', readonly: true, value: @consumer.send(attribute))
+    = content_tag(:input, nil, class: 'form-control bg-secondary', readonly: true, value: @consumer.send(attribute))
diff --git a/app/views/error_template_attributes/_form.html.slim b/app/views/error_template_attributes/_form.html.slim
index 72160cfd..e747a922 100644
--- a/app/views/error_template_attributes/_form.html.slim
+++ b/app/views/error_template_attributes/_form.html.slim
@@ -1,16 +1,16 @@
 = form_for(@error_template_attribute) do |f|
   = render('shared/form_errors', object: @error_template_attribute)
-  .form-group
-    = f.label(:key)
+  .mb-3
+    = f.label(:key, class: 'form-label')
     = f.text_field(:key, class: 'form-control', required: true)
-  .form-group
-    = f.label(:description)
+  .mb-3
+    = f.label(:description, class: 'form-label')
     = f.text_field(:description, class: 'form-control')
-  .form-group
-    = f.label(:regex)
+  .mb-3
+    = f.label(:regex, class: 'form-label')
     = f.text_field(:regex, class: 'form-control', required: true)
     .help-block.form-text == t('error_templates.hints.signature')
-  .form-check.form-group
+  .form-check.mb-3
     label.form-check-label
     = f.check_box(:important, class: 'form-check-input')
     = t('activerecord.attributes.error_template_attribute.important')
diff --git a/app/views/error_templates/_form.html.slim b/app/views/error_templates/_form.html.slim
index f912ec7b..80784d3a 100644
--- a/app/views/error_templates/_form.html.slim
+++ b/app/views/error_templates/_form.html.slim
@@ -1,20 +1,20 @@
 = form_for(@error_template) do |f|
   = render('shared/form_errors', object: @error_template)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:execution_environment_id)
+  .mb-3
+    = f.label(:execution_environment_id, class: 'form-label')
     = f.collection_select(:execution_environment_id, ExecutionEnvironment.all.order(:name), :id, :name, {include_blank: false}, class: 'form-control')
-  .form-group
-    = f.label(:signature)
+  .mb-3
+    = f.label(:signature, class: 'form-label')
     = f.text_field(:signature, class: 'form-control')
     .help-block.form-text == t('error_templates.hints.signature')
-  .form-group
-    = f.label(:description)
+  .mb-3
+    = f.label(:description, class: 'form-label')
     = f.text_field(:description, class: 'form-control')
-  .form-group
-    = f.label(:hint)
+  .mb-3
+    = f.label(:hint, class: 'form-label')
     = f.text_field(:hint, class: 'form-control')
     .help-block.form-text == t('error_templates.hints.hint_templates')
   .actions = render('shared/submit_button', f: f, object: @error_template)
diff --git a/app/views/execution_environments/_form.html.slim b/app/views/execution_environments/_form.html.slim
index 2a1122e8..75bf356c 100644
--- a/app/views/execution_environments/_form.html.slim
+++ b/app/views/execution_environments/_form.html.slim
@@ -1,52 +1,52 @@
 = form_for(@execution_environment) do |f|
   = render('shared/form_errors', object: @execution_environment)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:file_type_id)
+  .mb-3
+    = f.label(:file_type_id, class: 'form-label')
     = f.collection_select(:file_type_id, FileType.all.order(:name), :id, :name, {include_blank: true}, class: 'form-control')
-  .form-group
-    = f.label(:docker_image)
+  .mb-3
+    = f.label(:docker_image, class: 'form-label')
     | &nbsp;
     a.toggle-input data={text_initial: t('shared.new'), text_toggled: t('shared.back')} href='#' = t('shared.new')
     .original-input = f.select(:docker_image, @docker_images, {}, class: 'form-control')
     = f.text_field(:docker_image, class: 'alternative-input form-control', disabled: true)
     .help-block.form-text == t('.hints.docker_image')
-  .form-group
-    = f.label(:exposed_ports_list)
+  .mb-3
+    = f.label(:exposed_ports_list, class: 'form-label')
     = f.text_field(:exposed_ports_list, class: 'form-control', placeholder: '3000, 4000', pattern: '^(\s*(\d{1,5},\s*)*(\d{1,5}\s*))?$')
     .help-block.form-text = t('.hints.exposed_ports_list')
-  .form-group
-    = f.label(:memory_limit)
+  .mb-3
+    = f.label(:memory_limit, class: 'form-label')
     = f.number_field(:memory_limit, class: 'form-control', min: ExecutionEnvironment::MINIMUM_MEMORY_LIMIT, value: f.object.memory_limit || ExecutionEnvironment::DEFAULT_MEMORY_LIMIT)
-  .form-group
-    = f.label(:cpu_limit)
+  .mb-3
+    = f.label(:cpu_limit, class: 'form-label')
     = f.number_field(:cpu_limit, class: 'form-control', min: 1, step: 1, value: f.object.cpu_limit || ExecutionEnvironment::DEFAULT_CPU_LIMIT)
     .help-block.form-text = t('.hints.cpu_limit')
   .form-check.mb-3
     label.form-check-label
       = f.check_box(:network_enabled, class: 'form-check-input')
       = t('activerecord.attributes.execution_environment.network_enabled')
-  .form-group
-    = f.label(:permitted_execution_time)
+  .mb-3
+    = f.label(:permitted_execution_time, class: 'form-label')
     = f.number_field(:permitted_execution_time, class: 'form-control', min: 1)
-  .form-group
-    = f.label(:pool_size)
+  .mb-3
+    = f.label(:pool_size, class: 'form-label')
     = f.number_field(:pool_size, class: 'form-control', min: 0)
-  .form-group
-    = f.label(:run_command)
+  .mb-3
+    = f.label(:run_command, class: 'form-label')
     = f.text_field(:run_command, class: 'form-control', placeholder: 'command %{filename}', required: true)
     .help-block.form-text == t('.hints.command')
-  .form-group
-    = f.label(:test_command)
+  .mb-3
+    = f.label(:test_command, class: 'form-label')
     = f.text_field(:test_command, class: 'form-control', placeholder: 'command %{filename}')
     .help-block.form-text == t('.hints.command')
-  .form-group
-    = f.label(:testing_framework)
+  .mb-3
+    = f.label(:testing_framework, class: 'form-label')
     = f.select(:testing_framework, @testing_framework_adapters, {include_blank: true}, class: 'form-control')
-  .form-group
-    = f.label(:help)
+  .mb-3
+    = f.label(:help, class: 'form-label')
     = f.hidden_field(:help)
     .form-control.markdown
   .actions = render('shared/submit_button', f: f, object: @execution_environment)
diff --git a/app/views/execution_environments/index.html.slim b/app/views/execution_environments/index.html.slim
index e79b31fc..06247a17 100644
--- a/app/views/execution_environments/index.html.slim
+++ b/app/views/execution_environments/index.html.slim
@@ -1,11 +1,11 @@
 h1.d-inline-block = ExecutionEnvironment.model_name.human(count: 2)
 
 - if Runner.management_active?
-  = button_to( { action: :sync_all_to_runner_management }, { form_class: 'float-right mb-2', class: 'btn btn-success' })
+  = button_to( { action: :sync_all_to_runner_management }, { form_class: 'float-end mb-2', class: 'btn btn-success' })
     i.fa-solid.fa-upload
     = t('execution_environments.index.synchronize_all.button')
 
-.table-responsive
+.table-responsive.w-100
   table.table
     thead
       tr
diff --git a/app/views/execution_environments/shell.html.slim b/app/views/execution_environments/shell.html.slim
index 95b4cf18..f4031e25 100644
--- a/app/views/execution_environments/shell.html.slim
+++ b/app/views/execution_environments/shell.html.slim
@@ -1,7 +1,7 @@
 h1 = @execution_environment
 
 #shell data-message-timeout=t('exercises.editor.timeout', permitted_execution_time: @execution_environment.permitted_execution_time) data-message-out-of-memory=t('exercises.editor.out_of_memory',  memory_limit: @execution_environment.memory_limit) data-url=execute_command_execution_environment_path(@execution_environment)
-  .form-group
+  .mb-3
     label for='command' = t('.command')
     input#command.form-control type='text'
   pre#output data-message-no-output=t('exercises.implement.no_output', timestamp: l(Time.now, format: :short))
diff --git a/app/views/execution_environments/show.html.slim b/app/views/execution_environments/show.html.slim
index fbc58f0e..d29ead06 100644
--- a/app/views/execution_environments/show.html.slim
+++ b/app/views/execution_environments/show.html.slim
@@ -1,8 +1,8 @@
 h1.d-inline-block = @execution_environment
-.btn-group.float-right
+.btn-group.float-end
   = render('shared/edit_button', object: @execution_environment)
-  button.btn.btn-secondary.float-right.dropdown-toggle data-toggle='dropdown' type='button'
-  ul.dropdown-menu.dropdown-menu-right role='menu'
+  button.btn.btn-secondary.float-end.dropdown-toggle data-bs-toggle='dropdown' type='button'
+  ul.dropdown-menu.dropdown-menu-end role='menu'
     li = link_to(t('execution_environments.index.synchronize.button'), sync_to_runner_management_execution_environment_path(@execution_environment), method: :post, class: 'dropdown-item text-dark') if policy(@execution_environment).sync_to_runner_management?
     li = link_to(t('execution_environments.index.shell'), shell_execution_environment_path(@execution_environment), class: 'dropdown-item text-dark') if policy(@execution_environment).shell?
     li = link_to(t('shared.statistics'), statistics_execution_environment_path(@execution_environment), 'data-turbolinks' => "false", class: 'dropdown-item text-dark') if policy(@execution_environment).statistics?
diff --git a/app/views/exercise_collections/_add_exercise_modal.slim b/app/views/exercise_collections/_add_exercise_modal.slim
index e0880b58..cbe241f5 100644
--- a/app/views/exercise_collections/_add_exercise_modal.slim
+++ b/app/views/exercise_collections/_add_exercise_modal.slim
@@ -1,7 +1,7 @@
 - exercises = Exercise.order(:title)
 
 form#exercise-selection
-  .form-group
+  .mb-3
     span.badge = t('activerecord.attributes.exercise_collections.exercises')
     .mb-2
     = collection_select({}, :exercise_ids, exercises, :id, :title, {}, {id: 'add-exercise-list', class: 'form-control', multiple: true})
diff --git a/app/views/exercise_collections/_form.html.slim b/app/views/exercise_collections/_form.html.slim
index c31f8736..233aca3a 100644
--- a/app/views/exercise_collections/_form.html.slim
+++ b/app/views/exercise_collections/_form.html.slim
@@ -1,14 +1,14 @@
 = form_for(@exercise_collection, multipart: true) do |f|
   = render('shared/form_errors', object: @exercise_collection)
-  .form-group
-    = f.label(t('activerecord.attributes.exercise_collections.name'))
+  .mb-3
+    = f.label(t('activerecord.attributes.exercise_collections.name'), class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-check.form-group
+  .form-check.mb-3
     label.form-check-label
       = f.check_box(:use_anomaly_detection, class: 'form-check-input')
       = t('activerecord.attributes.exercise_collections.use_anomaly_detection')
-  .form-group
-    = f.label(t('activerecord.attributes.exercise_collections.user'))
+  .mb-3
+    = f.label(t('activerecord.attributes.exercise_collections.user'), class: 'form-label')
     = f.collection_select(:user_id, InternalUser.order(:name), :id, :name, {}, {class: 'form-control'})
 
   .table-responsive#exercise-list
@@ -30,7 +30,7 @@
   .d-none
     = f.collection_select(:exercise_ids, Exercise.all, :id, :title, {}, {id: 'exercise-select', class: 'form-control', multiple: true})
   .exercise-actions
-    button.btn.btn-outline-primary type='button' data-toggle='modal' data-target='#add-exercise-modal' = t('exercise_collections.form.add_exercises')
+    button.btn.btn-outline-primary type='button' data-bs-toggle='modal' data-bs-target='#add-exercise-modal' = t('exercise_collections.form.add_exercises')
     button.btn.btn-secondary#sort-button type='button' = t('exercise_collections.form.sort_by_title')
 
   .actions = render('shared/submit_button', f: f, object: @exercise_collection)
diff --git a/app/views/exercises/_add_tip_modal.slim b/app/views/exercises/_add_tip_modal.slim
index 92faa42b..ad85f524 100644
--- a/app/views/exercises/_add_tip_modal.slim
+++ b/app/views/exercises/_add_tip_modal.slim
@@ -1,7 +1,7 @@
 - tips = Tip.order(:title)
 
 form#tip-selection
-  .form-group
+  .mb-3
     span.badge = t('activerecord.attributes.exercise_tip.tip')
     .mb-2
     = collection_select({}, :tip_ids, tips, :id, :to_s, {}, {id: 'add-tip-list', class: 'form-control', multiple: true})
diff --git a/app/views/exercises/_code_field.html.slim b/app/views/exercises/_code_field.html.slim
index 5e05489b..1945178a 100644
--- a/app/views/exercises/_code_field.html.slim
+++ b/app/views/exercises/_code_field.html.slim
@@ -1,7 +1,7 @@
-.form-group class="form-group-#{attribute.to_s.gsub('_', '-')}"
-  = form.label(attribute, label)
+.mb-3
+  = form.label(attribute, label, class: 'form-label')
   = form.text_area(attribute, class: 'code-field form-control', rows: 16, style: "display:none;")
   = render partial: 'editor_edit', locals: { exercise: @exercise }
   .card.border-warning.p-2.my-2
-    = form.file_field(attribute, class: 'form-control-file', style: "display: inline-block;")
+    = form.file_field(attribute, class: 'form-control', style: "display: inline-block;")
     .help-block.form-text = t('exercises.file_form.hints.upload')
diff --git a/app/views/exercises/_comment_dialogcontent.html.slim b/app/views/exercises/_comment_dialogcontent.html.slim
index ab6dc6b4..706c8b9e 100644
--- a/app/views/exercises/_comment_dialogcontent.html.slim
+++ b/app/views/exercises/_comment_dialogcontent.html.slim
@@ -3,10 +3,10 @@
   .container
 
 label
-  input#subscribe type='checkbox' title=t('request_for_comments.subscribe_to_author') data-subscription=Subscription.where(user: current_user, request_for_comment_id: @request_for_comment.id, subscription_type: 'author', deleted: false).try(:first).try(:id)
+  input#subscribe.form-check-input type='checkbox' title=t('request_for_comments.subscribe_to_author') data-subscription=Subscription.where(user: current_user, request_for_comment_id: @request_for_comment.id, subscription_type: 'author', deleted: false).try(:first).try(:id)
   = t('request_for_comments.subscribe_to_author')
 
-#myComment
+#myComment.d-grid
   h5 =t('exercises.implement.comment.addyours')
   textarea.form-control
-  button#addCommentButton.btn.btn-block.btn-primary(type='button') =t('exercises.implement.comment.addCommentButton')
\ No newline at end of file
+  button#addCommentButton.btn.btn-primary(type='button') =t('exercises.implement.comment.addCommentButton')
diff --git a/app/views/exercises/_editor.html.slim b/app/views/exercises/_editor.html.slim
index 4e587b9e..c9550900 100644
--- a/app/views/exercises/_editor.html.slim
+++ b/app/views/exercises/_editor.html.slim
@@ -1,13 +1,13 @@
-- external_user_external_id = @current_user.respond_to?(:external_id) ? @current_user.external_id : '' #'tests' #(@current_user.uuid.present? ? @current_user.uuid : '')
-- external_user_id = @current_user.respond_to?(:external_id) ? @current_user.id : '' #'tests' #(@current_user.uuid.present? ? @current_user.uuid : '')
-- consumer_id = @current_user.respond_to?(:external_id) ? @current_user.consumer_id : '' #'tests' #(@current_user.uuid.present? ? @current_user.uuid : '')
+- external_user_external_id = @current_user.respond_to?(:external_id) ? @current_user.external_id : ''
+- external_user_id = @current_user.respond_to?(:external_id) ? @current_user.id : ''
+- consumer_id = @current_user.respond_to?(:external_id) ? @current_user.consumer_id : ''
 - show_break_interventions = @show_break_interventions || "false"
 - show_rfc_interventions = @show_rfc_interventions || "false"
 - show_tips_interventions = @show_tips_interventions || "false"
 - hide_rfc_button = @hide_rfc_button || false
+
 #editor.row data-exercise-id=@exercise.id data-message-depleted=t('exercises.editor.depleted') data-message-timeout=t('exercises.editor.timeout',  permitted_execution_time: @exercise.execution_environment.permitted_execution_time) data-message-out-of-memory=t('exercises.editor.out_of_memory',  memory_limit: @exercise.execution_environment.memory_limit) data-submissions-url=submissions_path data-user-id=@current_user.id data-user-external-id=external_user_external_id data-working-times-url=working_times_exercise_path(@exercise) data-intervention-save-url=intervention_exercise_path(@exercise) data-rfc-interventions=show_rfc_interventions data-break-interventions=show_break_interventions data-tips-interventions=show_tips_interventions data-course_token=@course_token data-search-save-url=search_exercise_path(@exercise)
   - unless @embed_options[:hide_sidebar]
-
     - additional_classes = 'sidebar-col'
     - if @tips.blank?
       - if @exercise.hide_file_tree
@@ -15,14 +15,16 @@
     - else
       - additional_classes = 'sidebar-col w-25'
     div id="sidebar" class=additional_classes = render('editor_file_tree', exercise: @exercise, files: @files)
+
+
   div.editor-col.col.p-0 id='frames'
     #editor-buttons.btn-group.enforce-bottom-margin
       = render('editor_button', disabled: true, icon: 'fa-solid fa-ban', id: 'dummy', label: t('exercises.editor.dummy'))
       = render('editor_button', icon: 'fa-solid fa-desktop', id: 'render', label: t('exercises.editor.render')) unless @embed_options[:hide_run_button]
-      = render('editor_button', data: {:'data-message-failure' => t('exercises.editor.run_failure'), :'data-message-network' => t('exercises.editor.network'), :'data-message-success' => t('exercises.editor.run_success'), :'data-placement' => 'top', :'data-toggle' => 'tooltip', :'data-container' => 'body'}, icon: 'fa-solid fa-play', id: 'run', label: t('exercises.editor.run'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + r')) unless @embed_options[:disable_run]
-      = render('editor_button', data: {:'data-placement' => 'top', :'data-toggle' => 'tooltip', :'data-container' => 'body'}, icon: 'fa-solid fa-stop', id: 'stop', label: t('exercises.editor.stop'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + r')) unless @embed_options[:disable_run]
-      = render('editor_button', data: {:'data-placement' => 'top', :'data-toggle' => 'tooltip', :'data-container' => 'body'}, icon: 'fa-solid fa-rocket', id: 'test', label: t('exercises.editor.test'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + t')) unless @embed_options[:disable_run]
-      = render('editor_button', data: {:'data-placement' => 'top', :'data-toggle' => 'tooltip', :'data-container' => 'body'}, icon: 'fa-solid fa-trophy', id: 'assess', label: t('exercises.editor.score'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + s')) unless @embed_options[:disable_score]
+      = render('editor_button', data: {:'data-message-failure' => t('exercises.editor.run_failure'), :'data-message-network' => t('exercises.editor.network'), :'data-message-success' => t('exercises.editor.run_success'), :'data-bs-placement' => 'top', :'data-bs-toggle' => 'tooltip', :'data-bs-container' => 'body'}, icon: 'fa-solid fa-play', id: 'run', label: t('exercises.editor.run'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + r')) unless @embed_options[:disable_run]
+      = render('editor_button', data: {:'data-bs-placement' => 'top', :'data-bs-toggle' => 'tooltip', :'data-bs-container' => 'body'}, icon: 'fa-solid fa-stop', id: 'stop', label: t('exercises.editor.stop'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + r')) unless @embed_options[:disable_run]
+      = render('editor_button', data: {:'data-bs-placement' => 'top', :'data-bs-toggle' => 'tooltip', :'data-bs-container' => 'body'}, icon: 'fa-solid fa-rocket', id: 'test', label: t('exercises.editor.test'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + t')) unless @embed_options[:disable_run]
+      = render('editor_button', data: {:'data-bs-placement' => 'top', :'data-bs-toggle' => 'tooltip', :'data-bs-container' => 'body'}, icon: 'fa-solid fa-trophy', id: 'assess', label: t('exercises.editor.score'), title: t('shared.tooltips.shortcut', shortcut: 'ALT + s')) unless @embed_options[:disable_score]
       - unless hide_rfc_button
         = render('editor_button', icon: 'fa-solid fa-comment', id: 'requestComments', label: t('exercises.editor.requestComments'), title: t('exercises.editor.requestCommentsTooltip'))
 
@@ -33,7 +35,7 @@
     #statusbar.d-flex.justify-content-between
       div
         - if !@embed_options[:disable_download] && @exercise.hide_file_tree?
-          button#download.p-0.border-0.btn-link.visible.bg-white
+          button#download.p-0.border-0.btn-link.visible.bg-white.text-primary
             i.fa-solid.fa-arrow-down
             = t('exercises.editor.download')
 
@@ -44,7 +46,7 @@
 
         = " | "
 
-        button#start-over-active-file.p-0.border-0.btn-link.bg-white data-message-confirm=t('exercises.editor.confirm_start_over_active_file') data-url=reload_exercise_path(@exercise)
+        button#start-over-active-file.p-0.border-0.btn-link.bg-white.text-primary data-message-confirm=t('exercises.editor.confirm_start_over_active_file') data-url=reload_exercise_path(@exercise)
           i.fa-solid.fa-clock-rotate-left
           = t('exercises.editor.start_over_active_file')
 
diff --git a/app/views/exercises/_editor_file_tree.html.slim b/app/views/exercises/_editor_file_tree.html.slim
index b3b1f7a5..e46d3dbe 100644
--- a/app/views/exercises/_editor_file_tree.html.slim
+++ b/app/views/exercises/_editor_file_tree.html.slim
@@ -1,41 +1,36 @@
-div id='sidebar-collapsed' class=(@exercise.hide_file_tree && @tips.blank? ? '' : 'd-none')
-  = render('editor_button', classes: 'btn-block btn-outline-dark btn', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa-solid fa-square-plus', id: 'sidebar-collapse-collapsed', label:'', title:t('exercises.editor.expand_action_sidebar'))
+div.d-grid.gap-2 id='sidebar-collapsed' class=(@exercise.hide_file_tree && @tips.blank? ? '' : 'd-none')
+  = render('editor_button', classes: 'btn-outline-dark', data: {:'data-bs-toggle' => 'tooltip', :'data-bs-placement' => 'right'}, icon: 'fa-solid fa-square-plus', id: 'sidebar-collapse-collapsed', label:'', title:t('exercises.editor.expand_action_sidebar'))
 
   - unless @embed_options[:disable_hints] or @tips.blank?
-    = render('editor_button', classes: 'btn-block btn-secondary btn mb-4', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa-solid fa-lightbulb', id: 'tips-collapsed', label:'', title: t('exercises.form.tips'))
+    = render('editor_button', classes: 'btn-secondary btn mb-4', data: {:'data-bs-toggle' => 'tooltip', :'data-bs-placement' => 'right'}, icon: 'fa-solid fa-lightbulb', id: 'tips-collapsed', label:'', title: t('exercises.form.tips'))
 
   //- if !@course_token.blank?
-    = render('editor_button', classes: 'btn-block btn-primary btn enforce-top-margin', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'right'}, icon: 'fa-solid fa-magnifying-glass', id: 'sidebar-search-collapsed', label: '', title: t('search.search_in_forum'))
+    = render('editor_button', classes: 'btn-primary btn enforce-top-margin', data: {:'data-bs-toggle' => 'tooltip', :'data-bs-placement' => 'right'}, icon: 'fa-solid fa-magnifying-glass', id: 'sidebar-search-collapsed', label: '', title: t('search.search_in_forum'))
 
-div.h-100.col-sm-12.enforce-bottom-margin id='sidebar-uncollapsed' class=(@exercise.hide_file_tree && @tips.blank? ? 'd-none' : '')
-  .position-absolute.d-flex.mb-1.w-100 style="overflow: auto; left: 0; top: 0; height: 100%;"
-    .w-100
-      = render('editor_button', classes: 'btn-block btn-outline-dark btn', icon: 'fa-solid fa-square-minus', id: 'sidebar-collapse', label: t('exercises.editor.collapse_action_sidebar'))
+div.d-grid.enforce-bottom-margin id='sidebar-uncollapsed' class=(@exercise.hide_file_tree && @tips.blank? ? 'd-none' : '')
+  = render('editor_button', classes: 'btn-outline-dark overflow-hidden mb-2', icon: 'fa-solid fa-square-minus', id: 'sidebar-collapse', label: t('exercises.editor.collapse_action_sidebar'))
+  #content-left-sidebar.overflow-scroll
+    - unless false &&@exercise.hide_file_tree
+      div.overflow-scroll
+        .card.border-secondary
+          .card-header.d-flex.justify-content-between.align-items-center.px-0.py-1
+            .px-2 = I18n.t('exercises.editor_file_tree.file_root')
+            div
+              - if @exercise.allow_file_creation
+                = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-bs-toggle' => 'tooltip', :'data-cause' => 'file'}, icon: 'fa-solid fa-plus', id: 'create-file', label: '', title: t('exercises.editor.create_file'))
+                = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-bs-toggle' => 'tooltip', :'data-cause' => 'file', :'data-message-confirm' => t('shared.confirm_destroy') }, icon: 'fa-regular fa-trash-can', id: 'destroy-file', label: '', title: t('exercises.editor.destroy_file'))
+              - unless @embed_options[:disable_download]
+                = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-bs-toggle' => 'tooltip'}, icon: 'fa-solid fa-arrow-down', id: 'download', label:'', title: t('exercises.editor.download'))
+              = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-bs-toggle' => 'tooltip', :'data-message-confirm' => t('exercises.editor.confirm_start_over'), :'data-url' => reload_exercise_path(@exercise)}, icon: 'fa-solid fa-clock-rotate-left', id: 'start-over', label: '', title: t('exercises.editor.start_over'))
 
-      - unless @exercise.hide_file_tree
-        div
-          hr
+          .card-body.pt-0.pe-0.ps-1.pb-1
 
-          .card.border-secondary
-            .card-header.d-flex.justify-content-between.align-items-center.px-0.py-1
-              .px-2 = I18n.t('exercises.editor_file_tree.file_root')
-              div
-                - if @exercise.allow_file_creation
-                  = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-toggle' => 'tooltip', :'data-cause' => 'file'}, icon: 'fa-solid fa-plus', id: 'create-file', label: '', title: t('exercises.editor.create_file'))
-                  = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-toggle' => 'tooltip', :'data-cause' => 'file', :'data-message-confirm' => t('shared.confirm_destroy') }, icon: 'fa-regular fa-trash-can', id: 'destroy-file', label: '', title: t('exercises.editor.destroy_file'))
-                - unless @embed_options[:disable_download]
-                  = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-toggle' => 'tooltip'}, icon: 'fa-solid fa-arrow-down', id: 'download', label:'', title: t('exercises.editor.download'))
-                = render('editor_button', classes: 'btn-default btn-sm', data: {:'data-toggle' => 'tooltip', :'data-message-confirm' => t('exercises.editor.confirm_start_over'), :'data-url' => reload_exercise_path(@exercise)}, icon: 'fa-solid fa-clock-rotate-left', id: 'start-over', label: '', title: t('exercises.editor.start_over'))
+            #files data-entries=FileTree.new(files).to_js_tree
 
-            .card-body.pt-0.pr-0.pl-1.pb-1
+        hr
 
-              #files data-entries=FileTree.new(files).to_js_tree
-
-          hr
-
-      - unless @embed_options[:disable_hints] or @tips.blank?
-        = render(partial: 'tips_content')
-        .mb-4
+    - unless @embed_options[:disable_hints] or @tips.blank?
+      = render(partial: 'tips_content')
 
       //- if !@course_token.blank?
           .input-group.enforce-top-margin
diff --git a/app/views/exercises/_editor_output.html.slim b/app/views/exercises/_editor_output.html.slim
index 8d8d1da8..2997ca3e 100644
--- a/app/views/exercises/_editor_output.html.slim
+++ b/app/views/exercises/_editor_output.html.slim
@@ -1,90 +1,86 @@
-div id='output_sidebar_collapsed'
-  = render('editor_button', classes: 'btn-block btn-outline-dark btn', data: {:'data-toggle' => 'tooltip', :'data-placement' => 'left'}, title: t('exercises.editor.expand_output_sidebar'), icon: 'fa-solid fa-square-plus', id: 'toggle-sidebar-output-collapsed', label: '')
-div.h-100 id='output_sidebar_uncollapsed' class='d-none col-sm-12 enforce-bottom-margin' data-message-no-output=t('exercises.implement.no_output_yet')
-  .row
-    = render('editor_button', classes: 'btn-block btn-outline-dark btn', icon: 'fa-solid fa-square-minus', id: 'toggle-sidebar-output', label: t('exercises.editor.collapse_output_sidebar'))
+div.d-grid id='output_sidebar_collapsed'
+  = render('editor_button', classes: 'btn-outline-dark btn', data: {:'data-bs-toggle' => 'tooltip', :'data-bs-placement' => 'left'}, title: t('exercises.editor.expand_output_sidebar'), icon: 'fa-solid fa-square-plus', id: 'toggle-sidebar-output-collapsed', label: '')
+div.d-grid id='output_sidebar_uncollapsed' class='d-none col-sm-12 enforce-bottom-margin' data-message-no-output=t('exercises.implement.no_output_yet')
+  = render('editor_button', classes: 'btn-outline-dark btn overflow-hidden mb-2', icon: 'fa-solid fa-square-minus', id: 'toggle-sidebar-output', label: t('exercises.editor.collapse_output_sidebar'))
 
-  div.position-absolute.d-flex.mb-1.w-100 style="overflow: auto; left: 0; bottom: 0; height: calc(100% - 3rem);"
-    div.w-100
-      div.enforce-big-top-margin.d-none id='score_div'
-        #results
-          h2 = t('exercises.implement.results')
-          p.test-count == t('exercises.implement.test_count', count: 0)
-          - unless @embed_options[:hide_test_results]
-            ul.list-unstyled
-            ul#test-dummies.d-none.list-unstyled
-              li.card.mt-2
-                .card-header.py-2
-                  h5.card-title.m-0 == t('exercises.implement.test_file', filename: '', number: 0)
-                .card-body.bg-white.text-dark
-                  = row(label: 'exercises.implement.passed_tests') do
-                    span.number
-                      | 0
-                    =<> t('shared.out_of')
-                    span.number
-                      | 0
-                  = row(label: 'activerecord.attributes.submission.score') do
-                    span.number
-                      | 0
-                    =<> t('shared.out_of')
-                    span.number
-                      | 0
-                  = row(label: 'exercises.implement.feedback')
-                  = row(label: 'exercises.implement.error_messages')
-                  /= row(label: 'exercises.implement.output', value: link_to(t('shared.show'), '#'))
-            ul#linter-dummies.d-none.list-unstyled
-              li.card.mt-2
-                .card-header.py-2
-                  h5.card-title.m-0 == t('exercises.implement.linter_file', filename: '', number: 0)
-                .card-body.bg-white.text-dark
-                  = row(label: 'exercises.implement.code_rating') do
-                    span.number
-                      | 0
-                    =<> t('shared.out_of')
-                    span.number
-                      | 0
-                  = row(label: 'activerecord.attributes.submission.score') do
-                    span.number
-                      | 0
-                    =<> t('shared.out_of')
-                    span.number
-                      | 0
-                  = row(label: 'exercises.implement.feedback')
-                  = row(label: 'exercises.implement.messages')
-        #score data-maximum-score=@exercise.maximum_score data-score=@exercise.final_submission(@current_user).try(:score)
-          h4
-            span == "#{t('activerecord.attributes.submission.score')}:&nbsp;"
-            span.score
-          .progress
-            .progress-bar role='progressbar'
+  #content-right-sidebar.overflow-scroll
+    div.enforce-bottom-margin.overflow-auto.d-none id='score_div'
+      #results
+        h2 = t('exercises.implement.results')
+        p.test-count == t('exercises.implement.test_count', count: 0)
+        - unless @embed_options[:hide_test_results]
+          ul.list-unstyled
+          ul#test-dummies.d-none.list-unstyled
+            li.card.mt-2
+              .card-header.py-2
+                h5.card-title.m-0 == t('exercises.implement.test_file', filename: '', number: 0)
+              .card-body.bg-white.text-dark
+                = row(label: 'exercises.implement.passed_tests') do
+                  span.number
+                    | 0
+                  =<> t('shared.out_of')
+                  span.number
+                    | 0
+                = row(label: 'activerecord.attributes.submission.score') do
+                  span.number
+                    | 0
+                  =<> t('shared.out_of')
+                  span.number
+                    | 0
+                = row(label: 'exercises.implement.feedback')
+                = row(label: 'exercises.implement.error_messages')
+                /= row(label: 'exercises.implement.output', value: link_to(t('shared.show'), '#'))
+          ul#linter-dummies.d-none.list-unstyled
+            li.card.mt-2
+              .card-header.py-2
+                h5.card-title.m-0 == t('exercises.implement.linter_file', filename: '', number: 0)
+              .card-body.bg-white.text-dark
+                = row(label: 'exercises.implement.code_rating') do
+                  span.number
+                    | 0
+                  =<> t('shared.out_of')
+                  span.number
+                    | 0
+                = row(label: 'activerecord.attributes.submission.score') do
+                  span.number
+                    | 0
+                  =<> t('shared.out_of')
+                  span.number
+                    | 0
+                = row(label: 'exercises.implement.feedback')
+                = row(label: 'exercises.implement.messages')
+      #score data-maximum-score=@exercise.maximum_score data-score=@exercise.final_submission(@current_user).try(:score)
+        h4
+          span == "#{t('activerecord.attributes.submission.score')}:&nbsp;"
+          span.score
+        .progress
+          .progress-bar role='progressbar'
 
-        br
-        - if lti_outcome_service?(@exercise.id, external_user_id)
-          p.text-center = render('editor_button', classes: 'btn-lg btn-success d-none', data: {:'data-url' => submit_exercise_path(@exercise)}, icon: 'fa-solid fa-paper-plane', id: 'submit', label: t('exercises.editor.submit'))
-          - if @exercise.submission_deadline.present? || @exercise.late_submission_deadline.present?
-            #deadline data-submission-deadline=@exercise.submission_deadline&.rfc2822 data-late-submission-deadline=@exercise.late_submission_deadline&.rfc2822
-              h4 = t('exercises.editor.deadline')
-              = t('exercises.editor.hints.disclaimer')
-        - else
-          p.text-center = render('editor_button', classes: 'btn-lg btn-secondary disabled', data: {:'data-placement' => 'bottom', :'data-tooltip' => true}, icon: 'fa-regular fa-clock', id: 'submit_outdated', label: t('exercises.editor.exercise_deadline_passed'), title: t('exercises.editor.tooltips.exercise_deadline_passed'))
-        hr
-      div.enforce-big-top-margin
-        #turtlediv
-          canvas#turtlecanvas.d-none width=400 height=400
-      div.enforce-big-top-margin
-        #prompt.input-group.d-none
-          div.input-group-prepend
-            span.input-group-text data-prompt=t('exercises.editor.input') = t('exercises.editor.input')
-          input#prompt-input.form-control type='text'
-          span.input-group-btn
-            button#prompt-submit.btn.btn-primary type="button" = t('exercises.editor.send')
-        - unless @embed_options[:disable_hints]
-          #error-hints
-            .heading = t('exercises.implement.error_hints.heading')
-            ul.body
-        #output.mt-2
-          pre = t('exercises.implement.no_output_yet')
-        - if CodeOcean::Config.new(:code_ocean).read[:flowr][:enabled] && !@embed_options[:disable_hints] && !@embed_options[:hide_test_results]
-          #flowrHint.card.text-white.bg-info data-url=CodeOcean::Config.new(:code_ocean).read[:flowr][:url] role='tab'
-            .card-header = t('exercises.implement.flowr.heading')
-            .card-body.text-dark.bg-white
+      br
+      - if lti_outcome_service?(@exercise.id, external_user_id)
+        p.text-center = render('editor_button', classes: 'btn-lg btn-success d-none', data: {:'data-url' => submit_exercise_path(@exercise)}, icon: 'fa-solid fa-paper-plane', id: 'submit', label: t('exercises.editor.submit'))
+        - if @exercise.submission_deadline.present? || @exercise.late_submission_deadline.present?
+          #deadline data-submission-deadline=@exercise.submission_deadline&.rfc2822 data-late-submission-deadline=@exercise.late_submission_deadline&.rfc2822
+            h4 = t('exercises.editor.deadline')
+            = t('exercises.editor.hints.disclaimer')
+      - else
+        p.text-center = render('editor_button', classes: 'btn-lg btn-secondary disabled', data: {:'data-bs-placement' => 'bottom', :'data-tooltip' => true}, icon: 'fa-regular fa-clock', id: 'submit_outdated', label: t('exercises.editor.exercise_deadline_passed'), title: t('exercises.editor.tooltips.exercise_deadline_passed'))
+      hr
+    #turtlediv.enforce-big-bottom-margin.overflow-auto.d-none
+      canvas#turtlecanvas width=400 height=400
+    div.enforce-big-bottom-margin.overflow-auto
+      #prompt.input-group.mb-2.d-none
+        span.input-group-text data-prompt=t('exercises.editor.input') = t('exercises.editor.input')
+        input#prompt-input.form-control type='text'
+        span.input-group-btn
+          button#prompt-submit.btn.btn-primary type="button" = t('exercises.editor.send')
+      - unless @embed_options[:disable_hints]
+        #error-hints.mb-2.p-2
+          .heading = t('exercises.implement.error_hints.heading')
+          ul.body.mb-0
+      #output
+        pre.overflow-scroll = t('exercises.implement.no_output_yet')
+      - if CodeOcean::Config.new(:code_ocean).read[:flowr][:enabled] && !@embed_options[:disable_hints] && !@embed_options[:hide_test_results]
+        #flowrHint.mb-2.card.text-white.bg-info data-url=CodeOcean::Config.new(:code_ocean).read[:flowr][:url] role='tab'
+          .card-header = t('exercises.implement.flowr.heading')
+          .card-body.text-dark.bg-white
diff --git a/app/views/exercises/_export_actions.html.slim b/app/views/exercises/_export_actions.html.slim
index 646c82c0..c545172d 100644
--- a/app/views/exercises/_export_actions.html.slim
+++ b/app/views/exercises/_export_actions.html.slim
@@ -1,14 +1,14 @@
 - if error
-    = button_tag type: 'button', class:'btn btn-primary pull-right export-button export-retry-button', data: {exercise_id: exercise.id} do
+    = button_tag type: 'button', class:'btn btn-primary float-end export-button export-retry-button', data: {exercise_id: exercise.id} do
       i.fa-solid.fa-arrows-rotate.confirm-icon
       = t('exercises.export_codeharbor.buttons.retry')
 - else
   - unless exported
     - if !exercise_found || update_right
-      = button_tag type: 'button', class:'btn btn-primary pull-right export-action export-button', data: {exercise_id: exercise.id} do
+      = button_tag type: 'button', class:'btn btn-primary float-end export-action export-button', data: {exercise_id: exercise.id} do
         i.fa-solid.fa-check.confirm-icon
         = t('exercises.export_codeharbor.buttons.export')
 
-= button_tag type: 'submit', class:'btn btn-secondary pull-right export-button', data: {dismiss: 'modal'} do
+= button_tag type: 'submit', class:'btn btn-secondary float-end export-button', data: {dismiss: 'modal'} do
   i.fa-solid.fa-xmark.abort-icon
   = exported ? t('exercises.export_codeharbor.buttons.close') : t('exercises.export_codeharbor.buttons.abort')
diff --git a/app/views/exercises/_file_form.html.slim b/app/views/exercises/_file_form.html.slim
index 8af2cfe6..3ac07a8a 100644
--- a/app/views/exercises/_file_form.html.slim
+++ b/app/views/exercises/_file_form.html.slim
@@ -4,7 +4,7 @@ li.card.mt-2
   .card-header role="tab" id="heading"
     - collapsed_class = f.index != 'index' ? 'collapsed' : nil
     - aria_expanded = f.index != 'index' ? 'false' : 'true'
-    a class=['file-heading', collapsed_class] data-toggle="collapse" href="#collapse#{f.index}" aria-expanded="#{aria_expanded}"
+    a class=['file-heading', collapsed_class] data-bs-toggle="collapse" href="#collapse#{f.index}" aria-expanded="#{aria_expanded}"
       div.clearfix role="button"
         i.fa-solid aria-hidden="true"
         span = f.object.filepath
@@ -12,19 +12,19 @@ li.card.mt-2
     .card-body
       - if policy(f.object).destroy? && id.present?
         .clearfix
-          .btn.btn-warning.btn-sm.float-right.delete-file data-file-url=code_ocean_file_path(id) = t('shared.destroy')
-      .form-group
-        = f.label(:name, t('activerecord.attributes.file.name'))
+          .btn.btn-warning.btn-sm.float-end.delete-file data-file-url=code_ocean_file_path(id) = t('shared.destroy')
+      .mb-3
+        = f.label(:name, t('activerecord.attributes.file.name'), class: 'form-label')
         = f.text_field(:name, class: 'form-control')
-      .form-group
-        = f.label(:path, t('activerecord.attributes.file.path'))
+      .mb-3
+        = f.label(:path, t('activerecord.attributes.file.path'), class: 'form-label')
         = f.text_field(:path, class: 'form-control')
         .help-block.form-text = t('.hints.path')
-      .form-group
-        = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'))
+      .mb-3
+        = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'), class: 'form-label')
         = f.collection_select(:file_type_id, @file_types, :id, :name, {}, class: 'form-control')
-      .form-group
-        = f.label(:role, t('activerecord.attributes.file.role'))
+      .mb-3
+        = f.label(:role, t('activerecord.attributes.file.role'), class: 'form-label')
         = f.select(:role, CodeOcean::File::TEACHER_DEFINED_ROLES.map { |role| [t("files.roles.#{role}"), role] }, {}, class: 'form-control')
       .form-check
         label.form-check-label
@@ -35,11 +35,11 @@ li.card.mt-2
           = f.check_box(:read_only, class: 'form-check-input')
           = t('activerecord.attributes.file.read_only')
       .test-related-fields style="display: #{f.object.teacher_defined_assessment? ? 'initial' : 'none'};"
-        .form-group
-          = f.label(:name, t('activerecord.attributes.file.feedback_message'))
+        .mb-3
+          = f.label(:name, t('activerecord.attributes.file.feedback_message'), class: 'form-label')
           = f.text_area(:feedback_message, class: 'form-control', maxlength: 255)
           .help-block.form-text = t('.hints.feedback_message')
-        .form-group
-          = f.label(:role, t('activerecord.attributes.file.weight'))
+        .mb-3
+          = f.label(:role, t('activerecord.attributes.file.weight'), class: 'form-label')
           = f.number_field(:weight, class: 'form-control', min: 0, step: 'any')
       = render('code_field', attribute: :content, form: f, label: t('activerecord.attributes.file.content'))
diff --git a/app/views/exercises/_form.html.slim b/app/views/exercises/_form.html.slim
index 4fab78d2..0ed9e03f 100644
--- a/app/views/exercises/_form.html.slim
+++ b/app/views/exercises/_form.html.slim
@@ -9,26 +9,26 @@
 
 = form_for(@exercise, data: {execution_environments: execution_environments, file_types: file_types}, multipart: true, builder: PagedownFormBuilder) do |f|
   = render('shared/form_errors', object: @exercise)
-  .form-group
-    = f.label(:title)
+  .mb-3
+    = f.label(:title, class: 'form-label')
     = f.text_field(:title, class: 'form-control', required: true)
-  .form-group
-    = f.label(:description)
+  .mb-3
+    = f.label(:description, class: 'form-label')
     = f.pagedown :description, input_html: { preview: true, rows: 10 }
-  .form-group
-    = f.label(:execution_environment_id)
+  .mb-3
+    = f.label(:execution_environment_id, class: 'form-label')
     = f.collection_select(:execution_environment_id, @execution_environments, :id, :name, {include_blank: t('exercises.form.none')}, class: 'form-control')
-  /.form-group
-    = f.label(:instructions)
+  /.mb-3
+    = f.label(:instructions, class: 'form-label')
     = f.hidden_field(:instructions)
     .form-control.markdown
-  .form-group
-    = f.label(:submission_deadline)
+  .mb-3
+    = f.label(:submission_deadline, class: 'form-label')
     .chosen-inline
       = f.datetime_select(:submission_deadline, include_blank: true)
     .help-block.form-text == t('.hints.submission_deadline')
-  .form-group
-    = f.label(:late_submission_deadline)
+  .mb-3
+    = f.label(:late_submission_deadline, class: 'form-label')
     .chosen-inline
       = f.datetime_select(:late_submission_deadline, include_blank: true)
     .help-block.form-text == t('.hints.late_submission_deadline')
@@ -52,15 +52,15 @@
     label.form-check-label
       = f.check_box(:allow_auto_completion, class: 'form-check-input')
       = t('activerecord.attributes.exercise.allow_auto_completion')
-  .form-group
-    = f.label(t('activerecord.attributes.exercise.difficulty'))
+  .mb-3
+    = f.label(t('activerecord.attributes.exercise.difficulty'), class: 'form-label')
     = f.number_field :expected_difficulty, in: 1..10, step: 1, class: 'form-control'
 
   h2 = t('exercises.form.tags')
   ul.list-unstyled.card-group
     li.card
       .card-header role="tab" id="heading"
-        a.file-heading data-toggle="collapse" href="#tag-collapse"
+        a.file-heading data-bs-toggle="collapse" href="#tag-collapse"
           div.clearfix role="button"
             span = t('exercises.form.click_to_collapse')
       .card-collapse.collapse id="tag-collapse" role="tabpanel"
@@ -73,29 +73,29 @@
                 th = t('activerecord.attributes.tag.difficulty')
               = collection_check_boxes :exercise, :tag_ids, @exercise_tags, :tag_id, :id do |b|
                 tr
-                  td = b.check_box
+                  td = b.check_box class: 'form-check-input'
                   td = b.object.tag.name
-                  td = number_field "tag_factors[#{b.object.tag.id}]", :factor, :value => b.object.factor, in: 1..10, step: 1, class: 'form-control-sm'
+                  td = number_field "tag_factors[#{b.object.tag.id}]", :factor, :value => b.object.factor, in: 1..10, step: 1, class: 'form-control form-control-sm'
 
   h2 = t('.tips')
   ul.list-unstyled.card-group
     li.card
       .card-header role="tab" id="tip-heading"
-        a.file-heading data-toggle="collapse" href="#tip-collapse"
+        a.file-heading data-bs-toggle="collapse" href="#tip-collapse"
           div.clearfix role="button"
             span = t('exercises.form.click_to_collapse')
       .card-collapse.collapse.mx-2 id="tip-collapse" role="tabpanel"
         = f.hidden_field(:tips, id: "tips-json", value: "")
         .list-group.nested-sortable-list.mt-2#tip-list
           = render(partial: 'tips/sortable_tip', collection: @tips, as: :exercise_tip)
-        button.btn.btn-outline-primary.my-2.w-100 type='button' data-toggle='modal' data-target='#add-tips-modal' = t('.add_tips')
+        button.btn.btn-outline-primary.my-2.w-100 type='button' data-bs-toggle='modal' data-bs-target='#add-tips-modal' = t('.add_tips')
 
   h2 = t('activerecord.attributes.exercise.files')
   ul#files.list-unstyled
     = f.fields_for :files do |files_form|
       = render('file_form', f: files_form)
 
-  a#add-file.btn.btn-secondary.btn-sm.float-right href='#' = t('.add_file')
+  a#add-file.btn.btn-secondary.btn-sm.float-end href='#' = t('.add_file')
   ul#dummies.d-none = f.fields_for(:files, CodeOcean::File.new, child_index: 'index') do |files_form|
     = render('file_form', f: files_form)
 
diff --git a/app/views/exercises/_request_comment_dialogcontent.html.slim b/app/views/exercises/_request_comment_dialogcontent.html.slim
index 861c4f4b..62ee2642 100644
--- a/app/views/exercises/_request_comment_dialogcontent.html.slim
+++ b/app/views/exercises/_request_comment_dialogcontent.html.slim
@@ -6,6 +6,6 @@ textarea.form-control.flex-grow-1#question(style='resize:none; height: 15vh;')
 p = ''
 / data-cause='requestComments' is not used here right now, we pass the button #requestComments (not askForCommentsButton) as initiator of the action.
 / But if we use this button, it will work since the correct cause is supplied
-div
-  button#askForCommentsButton.btn.btn-block.btn-primary(type='button' data-cause='requestComments' data-message-success=t('exercises.editor.request_for_comments_sent')) =t('exercises.implement.comment.request')
-  button#closeAskForCommentsButton.btn.btn-block.btn-warning(type='button') =t('activerecord.attributes.request_for_comments.close')
+.d-grid.gap-2
+  button#askForCommentsButton.btn.btn-primary(type='button' data-cause='requestComments' data-message-success=t('exercises.editor.request_for_comments_sent')) =t('exercises.implement.comment.request')
+  button#closeAskForCommentsButton.btn.btn-warning(type='button') =t('activerecord.attributes.request_for_comments.close')
diff --git a/app/views/exercises/_tips_content.html.slim b/app/views/exercises/_tips_content.html.slim
index 8424d378..cefd7fbb 100644
--- a/app/views/exercises/_tips_content.html.slim
+++ b/app/views/exercises/_tips_content.html.slim
@@ -5,7 +5,7 @@
   - append_javascript_pack_tag('highlight')
   - append_stylesheet_pack_tag('highlight')
 
-#tips.card.mt-2 role="tab" style="display: block;"
+#tips.card.d-block.overflow-scroll role="tab"
   .card-header.py-2
     i.fa-solid.fa-lightbulb
     = t('exercises.implement.tips.heading')
diff --git a/app/views/exercises/external_users/statistics.html.slim b/app/views/exercises/external_users/statistics.html.slim
index fe7d96b8..4b34fc89 100644
--- a/app/views/exercises/external_users/statistics.html.slim
+++ b/app/views/exercises/external_users/statistics.html.slim
@@ -42,15 +42,15 @@ h1
   - if policy(@exercise).detailed_statistics?
     .bg-light.w-100.p-2.mb-4.align-items-center.d-flex.justify-content-between
       - if @show_autosaves
-        span.pl-1.pb-1
+        span.ps-1.pb-1
           i.fa-solid.fa-circle-info.align-middle
-          small.mr-5.ml-1 = t('.toggle_status_on')
-        = link_to t('.toggle_autosave_off'), statistics_external_user_exercise_path(show_autosaves: false), class: "btn btn-outline-dark float-right btn-sm"
+          small.me-5.ms-1 = t('.toggle_status_on')
+        = link_to t('.toggle_autosave_off'), statistics_external_user_exercise_path(show_autosaves: false), class: "btn btn-outline-dark float-end btn-sm"
       - else
-        span.pl-1.pb-1
+        span.ps-1.pb-1
           i.fa-solid.fa-circle-info.align-middle
-          small.mr-5.ml-1 = t('.toggle_status_off')
-        = link_to t('.toggle_autosave_on'), statistics_external_user_exercise_path(show_autosaves: true), class: "btn btn-outline-dark float-right btn-sm"
+          small.me-5.ms-1 = t('.toggle_status_off')
+        = link_to t('.toggle_autosave_on'), statistics_external_user_exercise_path(show_autosaves: true), class: "btn btn-outline-dark float-end btn-sm"
   #timeline
     .table-responsive
       table.table
diff --git a/app/views/exercises/feedback.html.slim b/app/views/exercises/feedback.html.slim
index 9b221d0d..5085ed8c 100644
--- a/app/views/exercises/feedback.html.slim
+++ b/app/views/exercises/feedback.html.slim
@@ -4,7 +4,7 @@ h1 = link_to_if(policy(@exercise).show?, @exercise, exercise_path(@exercise))
   .header = t('activerecord.attributes.exercise.description')
   .value = render_markdown(@exercise.description)
 
-  span.header.col-sm-3.pl-0 = "#{t('activerecord.attributes.exercise.maximum_score')}"
+  span.header.col-sm-3.ps-0 = "#{t('activerecord.attributes.exercise.maximum_score')}"
   span.col-sm-9 = @exercise.maximum_score
 
   .header.mt-3 = t('activerecord.models.user_exercise_feedback.other')
@@ -21,7 +21,7 @@ h1 = link_to_if(policy(@exercise).show?, @exercise, exercise_path(@exercise))
             - if policy(@exercise).detailed_statistics?
               span.username = link_to_if(policy(feedback.user).show?, feedback.user.displayname, statistics_external_user_exercise_path(id: @exercise.id, external_user_id: feedback.user.id))
             - if feedback.anomaly_notification
-              i class="fa-regular fa-envelope" data-placement="top" data-toggle="tooltip" data-container="body" title=feedback.anomaly_notification.reason
+              i class="fa-regular fa-envelope" data-bs-placement="top" data-bs-toggle="tooltip" data-bs-container="body" title=feedback.anomaly_notification.reason
             span.date = feedback.created_at
         .card-collapse role="tabpanel"
           .card-body.feedback
@@ -32,8 +32,8 @@ h1 = link_to_if(policy(@exercise).show?, @exercise, exercise_path(@exercise))
           .card-footer
             div.clearfix.feedback-header
               span.points.flex-grow-1 = "#{t('exercises.statistics.score')}: #{@submissions[index].score}"
-              span.working_time.pull-right = "#{t('exercises.statistics.worktime')}: #{@exercise.average_working_time_for(feedback.user) or 0}"
+              span.working_time.float-end = "#{t('exercises.statistics.worktime')}: #{@exercise.average_working_time_for(feedback.user) or 0}"
 
   = render('shared/pagination', collection: @feedbacks)
 
-  script type="text/javascript" $(function () { $('[data-toggle="tooltip"]').tooltip() });
+  script type="text/javascript" $(function () { $('[data-bs-toggle="tooltip"]').tooltip() });
diff --git a/app/views/exercises/implement.html.slim b/app/views/exercises/implement.html.slim
index 6666dcbb..cd455ed4 100644
--- a/app/views/exercises/implement.html.slim
+++ b/app/views/exercises/implement.html.slim
@@ -3,36 +3,31 @@
      Otherwise, lti_parameters might be nil
   meta name="turbolinks-cache-control" content="no-cache"
 
-.row
-  #editor-column.col-md-12
-    - unless @embed_options[:hide_exercise_description]
-      .exercise.clearfix
-        div
-          span.badge.badge-pill.badge-primary.float-right.score
+// col-md-12 required for CodePilot
+#editor-column.col-md-12
+  - unless @embed_options[:hide_exercise_description]
+    .exercise.clearfix
+      div
+        span.badge.rounded-pill.bg-primary.float-end.score
 
-          h1 id="exercise-headline"
-            i id="description-symbol" class=(@embed_options[:collapse_exercise_description] ? 'fa-solid fa-chevron-right' : 'fa-solid fa-chevron-down')
-            = @exercise.title
+        h1 id="exercise-headline"
+          i id="description-symbol" class=(@embed_options[:collapse_exercise_description] ? 'fa-solid fa-chevron-right' : 'fa-solid fa-chevron-down')
+          = @exercise.title
 
-        #description-card.lead class=(@embed_options[:collapse_exercise_description] ? 'description-card-collapsed' : 'description-card')
-          = render_markdown(@exercise.description)
+      #description-card.lead class=(@embed_options[:collapse_exercise_description] ? 'description-card-collapsed' : 'description-card')
+        = render_markdown(@exercise.description)
 
-        a#toggle href="#" data-show=t('shared.show') data-hide=t('shared.hide')
-          - if @embed_options[:collapse_exercise_description]
-            = t('shared.show')
-          - else
-            = t('shared.hide')
+      a#toggle href="#" data-show=t('shared.show') data-hide=t('shared.hide')
+        - if @embed_options[:collapse_exercise_description]
+          = t('shared.show')
+        - else
+          = t('shared.hide')
 
-    #alert.alert.alert-danger role='alert'
-      h4 = t('.alert.title')
-      p = t('.alert.text', application_name: application_name)
 
-    #development-environment
-      .tab-content
-        #workspace.tab-pane.active = render('editor', exercise: @exercise, files: @files, submission: @submission)
+  = render('editor', exercise: @exercise, files: @files, submission: @submission)
 
-  - if qa_url
-    #questions-column
-      #questions-holder data-url="#{qa_url}/qa/index/#{@exercise.id}/#{@user_id}"
-    = qa_js_tag
+- if qa_url
+  #questions-column
+    #questions-holder data-url="#{qa_url}/qa/index/#{@exercise.id}/#{@user_id}"
+  = qa_js_tag
 
diff --git a/app/views/exercises/index.html.slim b/app/views/exercises/index.html.slim
index 8f6267a5..3c91b5d1 100644
--- a/app/views/exercises/index.html.slim
+++ b/app/views/exercises/index.html.slim
@@ -1,16 +1,15 @@
 h1 = Exercise.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:execution_environment_id_eq, t('activerecord.attributes.exercise.execution_environment'), class: 'sr-only')
-      = f.collection_select(:execution_environment_id_eq, @execution_environments.with_exercises, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.exercise.execution_environment'))
-    .form-group
-      = f.label(:title_cont, t('activerecord.attributes.exercise.title'), class: 'sr-only')
-      = f.search_field(:title_cont, class: 'form-control', placeholder: t('activerecord.attributes.exercise.title'))
+  .col-auto
+    = f.label(:execution_environment_id_eq, t('activerecord.attributes.exercise.execution_environment'), class: 'visually-hidden form-label')
+    = f.collection_select(:execution_environment_id_eq, @execution_environments.with_exercises, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.exercise.execution_environment'))
+  .col-auto
+    = f.label(:title_cont, t('activerecord.attributes.exercise.title'), class: 'visually-hidden form-label')
+    = f.search_field(:title_cont, class: 'form-control', placeholder: t('activerecord.attributes.exercise.title'))
 
 .table-responsive
-  table.table.mt-4
+  table.table.mt-2
     thead
       tr
         th.p-1 = sort_link(@search, :title, t('activerecord.attributes.exercise.title'))
@@ -41,8 +40,8 @@ h1 = Exercise.model_name.human(count: 2)
 
           td.p-1
             .btn-group
-              button.btn.btn-outline-primary.btn-sm.dropdown-toggle data-toggle="dropdown" type="button" = t('shared.actions_button')
-              ul.dropdown-menu.float-right role="menu"
+              button.btn.btn-outline-primary.btn-sm.dropdown-toggle data-bs-toggle="dropdown" type="button" = t('shared.actions_button')
+              ul.dropdown-menu.float-end role="menu"
                 li = link_to(t('shared.show'), exercise, 'data-turbolinks' => "false", class: 'dropdown-item') if policy(exercise).show?
                 li = link_to(t('activerecord.models.user_exercise_feedback.other'), feedback_exercise_path(exercise), class: 'dropdown-item') if policy(exercise).feedback?
                 li = link_to(t('activerecord.models.request_for_comment.other'), rfcs_for_exercise_path(exercise), class: 'dropdown-item') if policy(exercise).rfcs_for_exercise?
diff --git a/app/views/exercises/show.html.slim b/app/views/exercises/show.html.slim
index b9e3f8e3..f8762ed0 100644
--- a/app/views/exercises/show.html.slim
+++ b/app/views/exercises/show.html.slim
@@ -6,10 +6,10 @@
   - append_stylesheet_pack_tag('highlight')
 
 h1.d-inline-block = @exercise
-.btn-group.float-right
+.btn-group.float-end
   = render('shared/edit_button', object: @exercise)
-  button.btn.btn-secondary.float-right.dropdown-toggle data-toggle='dropdown' type='button'
-  ul.dropdown-menu.dropdown-menu-right role='menu'
+  button.btn.btn-secondary.float-end.dropdown-toggle data-bs-toggle='dropdown' type='button'
+  ul.dropdown-menu.dropdown-menu-end role='menu'
     li = link_to(t('exercises.index.implement'), implement_exercise_path(@exercise), 'data-turbolinks' => "false", class: 'dropdown-item text-dark') if policy(@exercise).implement?
     li = link_to(t('shared.statistics'), statistics_exercise_path(@exercise), 'data-turbolinks' => "false", class: 'dropdown-item text-dark') if policy(@exercise).statistics?
     li = link_to(t('activerecord.models.user_exercise_feedback.other'), feedback_exercise_path(@exercise), class: 'dropdown-item text-dark') if policy(@exercise).feedback?
@@ -35,9 +35,10 @@ h1.d-inline-block = @exercise
 = row(label: 'exercise.uuid', value: @exercise.uuid)
 = row(label: 'exercise.tags', value: @exercise.exercise_tags.map{|et| "#{et.tag.name} (#{et.factor})"}.sort.join(", "))
 = row(label: 'exercise.embedding_parameters', class: 'mb-4') do
-  = content_tag(:input, nil, class: 'form-control mb-4', readonly: true, value: @exercise.unpublished? ? t('exercises.show.is_unpublished') : embedding_parameters(@exercise))
+  = content_tag(:input, nil, class: 'form-control bg-secondary mb-4', readonly: true, value: @exercise.unpublished? ? t('exercises.show.is_unpublished') : embedding_parameters(@exercise))
 
 - unless @tips.blank?
+  .mt-2
   = render(partial: 'tips_content')
 
 h2.mt-4 = t('activerecord.attributes.exercise.files')
@@ -46,14 +47,14 @@ ul.list-unstyled#files
   - @exercise.files.each do |file|
     li.card.mt-2
       .card-header role="tab" id="heading"
-        a.file-heading.collapsed data-toggle="collapse" data-parent="#files" href=".collapse#{file.id}"
+        a.file-heading.collapsed data-bs-toggle="collapse" data-bs-parent="#files" href=".collapse#{file.id}"
           div.clearfix role="button"
             i.fa-solid aria-hidden="true"
             span = file.filepath
       .card-collapse.collapse class="collapse#{file.id}" role="tabpanel"
         .card-body
           - if policy(file).destroy?
-            .clearfix = link_to(t('shared.destroy'), file, class:'btn btn-warning btn-sm float-right', data: {confirm: t('shared.confirm_destroy')}, method: :delete)
+            .clearfix = link_to(t('shared.destroy'), file, class:'btn btn-warning btn-sm float-end', data: {confirm: t('shared.confirm_destroy')}, method: :delete)
           = render('shared/file', file: file)
 
 = render('shared/modal', id: 'export-modal', title: t('exercises.export_codeharbor.dialogtitle'), template: 'exercises/_export_dialogcontent')
\ No newline at end of file
diff --git a/app/views/exercises/study_group_dashboard.html.slim b/app/views/exercises/study_group_dashboard.html.slim
index f2e281ef..4c615561 100644
--- a/app/views/exercises/study_group_dashboard.html.slim
+++ b/app/views/exercises/study_group_dashboard.html.slim
@@ -15,7 +15,7 @@ h4.mt-4
 .d-none#initial_graph_data data-graph_data=ActiveSupport::JSON.encode(@graph_data);
 div.w-100#chart_stacked
 
-.d-none.badge-info.container.py-2#no_chart_data
+.d-none.bg-info.container.py-2#no_chart_data
   i class="fa-solid fa-info" aria-hidden="true"
   = t('.no_data_yet')
 
@@ -27,9 +27,9 @@ h4.mt-4
     thead
       tr
         th.text-center
-          i.mr-0 class="fa-regular fa-lightbulb" aria-hidden="true" title = t('request_for_comments.solved')
+          i.me-0 class="fa-regular fa-lightbulb" aria-hidden="true" title = t('request_for_comments.solved')
         th.text-center
-          i.mr-0 class="fa-solid fa-comment" aria-hidden="true" title = t('request_for_comments.comments') align="center"
+          i.me-0 class="fa-solid fa-comment" aria-hidden="true" title = t('request_for_comments.comments') align="center"
         th.col-12 = t('activerecord.attributes.request_for_comments.question')
         th = t('activerecord.attributes.request_for_comments.username')
         th.text-nowrap = t('activerecord.attributes.request_for_comments.requested_at')
diff --git a/app/views/external_users/index.html.slim b/app/views/external_users/index.html.slim
index d621085d..91ac6ccd 100644
--- a/app/views/external_users/index.html.slim
+++ b/app/views/external_users/index.html.slim
@@ -2,21 +2,21 @@ h1 = ExternalUser.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
   .row.px-3
-    .form-group
-      = f.label(:name_cont, t('activerecord.attributes.external_user.name'), class: 'sr-only')
+    .mb-3
+      = f.label(:name_cont, t('activerecord.attributes.external_user.name'), class: 'visually-hidden form-label')
       = f.search_field(:name_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.name'))
-    .form-group
-      = f.label(:email_cont, t('activerecord.attributes.external_user.email'), class: 'sr-only')
+    .mb-3
+      = f.label(:email_cont, t('activerecord.attributes.external_user.email'), class: 'visually-hidden form-label')
       = f.search_field(:email_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.email'))
-    .form-group
-      = f.label(:external_id_cont, t('activerecord.attributes.external_user.external_id'), class: 'sr-only')
+    .mb-3
+      = f.label(:external_id_cont, t('activerecord.attributes.external_user.external_id'), class: 'visually-hidden form-label')
       = f.search_field(:external_id_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.external_id'))
   .row.px-3
-    .form-group
-      = f.label(:role_eq, t('activerecord.attributes.external_user.role'), class: 'sr-only')
+    .mb-3
+      = f.label(:role_eq, t('activerecord.attributes.external_user.role'), class: 'visually-hidden form-label')
       = f.select(:role_eq, User::ROLES.map { |role| [t("users.roles.#{role}"), role] }, { include_blank: true }, class: 'form-control', prompt: t('activerecord.attributes.external_user.role'))
-    .form-group
-      = f.label(:consumer_id_eq, t('activerecord.attributes.external_user.consumer'), class: 'sr-only')
+    .mb-3
+      = f.label(:consumer_id_eq, t('activerecord.attributes.external_user.consumer'), class: 'visually-hidden form-label')
       = f.collection_select(:consumer_id_eq, Consumer.with_external_users, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.external_user.consumer'))
 .table-responsive
   table.table
diff --git a/app/views/file_templates/_form.html.slim b/app/views/file_templates/_form.html.slim
index 1a5c34bc..be5390da 100644
--- a/app/views/file_templates/_form.html.slim
+++ b/app/views/file_templates/_form.html.slim
@@ -1,12 +1,12 @@
 = form_for(@file_template) do |f|
   = render('shared/form_errors', object: @file_template)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:file_type_id)
+  .mb-3
+    = f.label(:file_type_id, class: 'form-label')
     = f.collection_select(:file_type_id, FileType.all.order(:name), :id, :name, {}, class: 'form-control')
-  .form-group
-    = f.label(:content)
+  .mb-3
+    = f.label(:content, class: 'form-label')
     = f.text_area(:content, class: 'form-control')
   .actions = render('shared/submit_button', f: f, object: @file_template)
diff --git a/app/views/file_types/_form.html.slim b/app/views/file_types/_form.html.slim
index e234a457..0c5f94da 100644
--- a/app/views/file_types/_form.html.slim
+++ b/app/views/file_types/_form.html.slim
@@ -1,16 +1,16 @@
 = form_for(@file_type) do |f|
   = render('shared/form_errors', object: @file_type)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:editor_mode)
+  .mb-3
+    = f.label(:editor_mode, class: 'form-label')
     = f.select(:editor_mode, @editor_modes, {}, class: 'form-control')
-  .form-group
-    = f.label(:file_extension)
+  .mb-3
+    = f.label(:file_extension, class: 'form-label')
     = f.text_field(:file_extension, class: 'form-control', placeholder: '.rb')
-  .form-group
-    = f.label(:indent_size)
+  .mb-3
+    = f.label(:indent_size, class: 'form-label')
     = f.number_field(:indent_size, class: 'form-control', placeholder: 2, required: true)
   .form-check
     label.form-check-label
diff --git a/app/views/internal_users/_form.html.slim b/app/views/internal_users/_form.html.slim
index 4a6ff45c..20dd5434 100644
--- a/app/views/internal_users/_form.html.slim
+++ b/app/views/internal_users/_form.html.slim
@@ -1,15 +1,15 @@
 = form_for(@user) do |f|
   = render('shared/form_errors', object: @user)
-  .form-group
-    = f.label(:consumer_id)
+  .mb-3
+    = f.label(:consumer_id, class: 'form-label')
     = f.collection_select(:consumer_id, Consumer.all.sort_by(&:name), :id, :name, {}, class: 'form-control')
-  .form-group
-    = f.label(:email)
+  .mb-3
+    = f.label(:email, class: 'form-label')
     = f.email_field(:email, class: 'form-control', required: true)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
-  .form-group
-    = f.label(:role)
+  .mb-3
+    = f.label(:role, class: 'form-label')
     = f.select(:role, User::ROLES.map { |role| [t("users.roles.#{role}"), role] }, {selected: @user.role || 'teacher'}, class: 'form-control')
   .actions = render('shared/submit_button', f: f, object: @user)
diff --git a/app/views/internal_users/activate.html.slim b/app/views/internal_users/activate.html.slim
index 25795ed6..e19459b8 100644
--- a/app/views/internal_users/activate.html.slim
+++ b/app/views/internal_users/activate.html.slim
@@ -2,11 +2,11 @@ h1 = t('.headline')
 
 = form_for(@user, url: activate_internal_user_path) do |f|
   = render('shared/form_errors', object: @user)
-  .form-group
-    = f.label(:password)
+  .mb-3
+    = f.label(:password, class: 'form-label')
     = f.password_field(:password, class: 'form-control', required: true)
-  .form-group
-    = f.label(:password_confirmation)
+  .mb-3
+    = f.label(:password_confirmation, class: 'form-label')
     = f.password_field(:password_confirmation, class: 'form-control', required: true)
   = f.hidden_field(:activation_token)
   .actions = submit_tag(t('.submit'), class: 'btn btn-primary')
diff --git a/app/views/internal_users/forgot_password.html.slim b/app/views/internal_users/forgot_password.html.slim
index ca10fdac..dc417168 100644
--- a/app/views/internal_users/forgot_password.html.slim
+++ b/app/views/internal_users/forgot_password.html.slim
@@ -1,7 +1,7 @@
 h1 = t('.headline')
 
 = form_tag do
-  .form-group
+  .mb-3
     = label_tag(:email, t('activerecord.attributes.internal_user.email'))
     = email_field_tag(:email, params[:email], autofocus: true, class: 'form-control', required: true)
   .actions = submit_tag(t('.submit'), class: 'btn btn-primary')
diff --git a/app/views/internal_users/index.html.slim b/app/views/internal_users/index.html.slim
index 768a6dd6..8b0c0fde 100644
--- a/app/views/internal_users/index.html.slim
+++ b/app/views/internal_users/index.html.slim
@@ -1,16 +1,15 @@
 h1 = InternalUser.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:consumer_id_eq, t('activerecord.attributes.internal_user.consumer'), class: 'sr-only')
-      = f.collection_select(:consumer_id_eq, Consumer.with_internal_users, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.internal_user.consumer'))
-    .form-group
-      = f.label(:email_cont, t('activerecord.attributes.internal_user.email'), class: 'sr-only')
-      = f.search_field(:email_cont, class: 'form-control', placeholder: t('activerecord.attributes.internal_user.email'))
-    .form-group
-      = f.label(:role_eq, t('activerecord.attributes.internal_user.role'), class: 'sr-only')
-      = f.select(:role_eq, User::ROLES.map { |role| [t("users.roles.#{role}"), role] }, {}, class: 'form-control', prompt: t('activerecord.attributes.internal_user.role'))
+  .col-auto
+    = f.label(:consumer_id_eq, t('activerecord.attributes.internal_user.consumer'), class: 'visually-hidden form-label')
+    = f.collection_select(:consumer_id_eq, Consumer.with_internal_users, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.internal_user.consumer'))
+  .col-sm
+    = f.label(:email_cont, t('activerecord.attributes.internal_user.email'), class: 'visually-hidden form-label')
+    = f.search_field(:email_cont, class: 'form-control', placeholder: t('activerecord.attributes.internal_user.email'))
+  .col-auto
+    = f.label(:role_eq, t('activerecord.attributes.internal_user.role'), class: 'visually-hidden form-label')
+    = f.select(:role_eq, User::ROLES.map { |role| [t("users.roles.#{role}"), role] }, {}, class: 'form-control', prompt: t('activerecord.attributes.internal_user.role'))
 
 .table-responsive
   table.table.mt-4
diff --git a/app/views/internal_users/reset_password.html.slim b/app/views/internal_users/reset_password.html.slim
index 857121c2..c4011867 100644
--- a/app/views/internal_users/reset_password.html.slim
+++ b/app/views/internal_users/reset_password.html.slim
@@ -2,11 +2,11 @@ h1 = t('.headline')
 
 = form_for(@user, url: reset_password_internal_user_path) do |f|
   = render('shared/form_errors', object: @user)
-  .form-group
-    = f.label(:password)
+  .mb-3
+    = f.label(:password, class: 'form-label')
     = f.password_field(:password, class: 'form-control', required: true)
-  .form-group
-    = f.label(:password_confirmation)
+  .mb-3
+    = f.label(:password_confirmation, class: 'form-label')
     = f.password_field(:password_confirmation, class: 'form-control', required: true)
   = f.hidden_field(:reset_password_token)
   .actions = submit_tag(t('.submit'), class: 'btn btn-primary')
diff --git a/app/views/layouts/application.html.slim b/app/views/layouts/application.html.slim
index 6145f52d..044088d1 100644
--- a/app/views/layouts/application.html.slim
+++ b/app/views/layouts/application.html.slim
@@ -42,13 +42,13 @@ html lang="#{I18n.locale || I18n.default_locale}"
           .navbar-brand
             i.fa-solid.fa-code
             = application_name
-          button.navbar-toggler data-target='#navbar-collapse' data-toggle='collapse' type='button' aria-expanded='false' aria-label='Toggle navigation'
+          button.navbar-toggler data-bs-target='#navbar-collapse' data-bs-toggle='collapse' type='button' aria-expanded='false' aria-label='Toggle navigation'
             span.navbar-toggler-icon
           #navbar-collapse.collapse.navbar-collapse
             = render('navigation', cached: true)
-            ul.nav.navbar-nav.ml-auto
+            ul.nav.navbar-nav.ms-auto
               = render('locale_selector', cached: true)
-              li.nav-item.mr-3 = link_to(t('shared.help.link'), '#modal-help', data: {toggle: 'modal'}, class: 'nav-link')
+              li.nav-item.me-3 = link_to(t('shared.help.link'), '#modal-help', data: {toggle: 'modal'}, class: 'nav-link')
               = render('session')
     div data-controller=controller_name
       = render('flash')
diff --git a/app/views/proxy_exercises/_form.html.slim b/app/views/proxy_exercises/_form.html.slim
index acc54ccc..3b63229e 100644
--- a/app/views/proxy_exercises/_form.html.slim
+++ b/app/views/proxy_exercises/_form.html.slim
@@ -1,10 +1,10 @@
 = form_for(@proxy_exercise, multipart: true, builder: PagedownFormBuilder) do |f|
   = render('shared/form_errors', object: @proxy_exercise)
-  .form-group
-    = f.label(:title)
+  .mb-3
+    = f.label(:title, class: 'form-label')
     = f.text_field(:title, class: 'form-control', required: true)
-  .form-group
-    = f.label(:description)
+  .mb-3
+    = f.label(:description, class: 'form-label')
     = f.pagedown :description, input_html: { preview: true, rows: 10 }
   .form-check.mb-3
     label.form-check-label
@@ -21,7 +21,7 @@
           th = sort_link(@search, :created_at, t('shared.created_at'))
       = collection_check_boxes :proxy_exercise, :exercise_ids, @exercises, :id, :title do |b|
         tr
-          td = b.check_box
+          td = b.check_box class: 'form-check-input'
           td = link_to_if(policy(b.object).show?, b.object, b.object)
           td = l(b.object.created_at, format: :short)
 
diff --git a/app/views/proxy_exercises/index.html.slim b/app/views/proxy_exercises/index.html.slim
index b4fe7acc..74266aab 100644
--- a/app/views/proxy_exercises/index.html.slim
+++ b/app/views/proxy_exercises/index.html.slim
@@ -1,10 +1,9 @@
 h1 = ProxyExercise.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:title_cont, t('activerecord.attributes.proxy_exercise.title'), class: 'sr-only')
-      = f.search_field(:title_cont, class: 'form-control', placeholder: t('activerecord.attributes.proxy_exercise.title'))
+  .col-auto
+    = f.label(:title_cont, t('activerecord.attributes.proxy_exercise.title'), class: 'visually-hidden form-label')
+    = f.search_field(:title_cont, class: 'form-control', placeholder: t('activerecord.attributes.proxy_exercise.title'))
 
 .table-responsive
   table.table.mt-4
@@ -28,10 +27,10 @@ h1 = ProxyExercise.model_name.human(count: 2)
 
           td.p-1
             .btn-group
-              button.btn.btn-outline-primary.btn-sm.dropdown-toggle data-toggle="dropdown" type="button" = t('shared.actions_button')
+              button.btn.btn-outline-primary.btn-sm.dropdown-toggle data-bs-toggle="dropdown" type="button" = t('shared.actions_button')
               span.caret
-              span.sr-only Toggle Dropdown
-              ul.dropdown-menu.float-right role="menu"
+              span.visually-hidden Toggle Dropdown
+              ul.dropdown-menu.float-end role="menu"
                 li = link_to(t('shared.show'), proxy_exercise, 'data-turbolinks' => "false", class: 'dropdown-item') if policy(proxy_exercise).show?
                 li = link_to(t('shared.destroy'), proxy_exercise, data: {confirm: t('shared.confirm_destroy')}, method: :delete, class: 'dropdown-item') if policy(proxy_exercise).destroy?
                 li = link_to(t('.clone'), clone_proxy_exercise_path(proxy_exercise), data: {confirm: t('shared.confirm_destroy')}, method: :post, class: 'dropdown-item') if policy(proxy_exercise).clone?
diff --git a/app/views/proxy_exercises/show.html.slim b/app/views/proxy_exercises/show.html.slim
index c8ce10a7..892ef4c6 100644
--- a/app/views/proxy_exercises/show.html.slim
+++ b/app/views/proxy_exercises/show.html.slim
@@ -8,7 +8,7 @@ h1
 = row(label: 'exercise.public', value: @proxy_exercise.public?)
 = row(label: 'exercise.description', value: @proxy_exercise.description)
 = row(label: 'exercise.embedding_parameters', class: 'mb-4') do
-  = content_tag(:input, nil, class: 'form-control mb-4', readonly: true, value: embedding_parameters(@proxy_exercise))
+  = content_tag(:input, nil, class: 'form-control bg-secondary mb-4', readonly: true, value: embedding_parameters(@proxy_exercise))
 
 h2.mt-4 Exercises
 .table-responsive
diff --git a/app/views/request_for_comments/index.html.slim b/app/views/request_for_comments/index.html.slim
index c02f9868..8328308c 100644
--- a/app/views/request_for_comments/index.html.slim
+++ b/app/views/request_for_comments/index.html.slim
@@ -1,17 +1,19 @@
 h1 = RequestForComment.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:exercise_title_cont, t('activerecord.attributes.request_for_comments.exercise'), class: 'sr-only')
-      = f.search_field(:exercise_title_cont, class: 'form-control', placeholder: t('activerecord.attributes.request_for_comments.exercise'))
-    .form-group
-      = f.label(:title_cont,  t('request_for_comments.solved'), class: 'sr-only')
-      = f.select(:solved_not_eq,  [[t('request_for_comments.show_all'), 2], [t('request_for_comments.show_unsolved'), 1], [t('request_for_comments.show_solved'), 0]])
-  .form-group
-    = f.label(:submission_study_group_id_eq,  t('request_for_comments.index.study_groups.placeholder'), class: 'sr-only')
-    = f.grouped_collection_select(:submission_study_group_id_in, @study_groups_grouping, :second, :first, :id, :to_s, {},
-            { class: 'form-control', multiple: true, "data-placeholder": t('request_for_comments.index.study_groups.placeholder') })
+  .col-md-9.col
+    .row.align-items-center
+      .col-auto
+        = f.label(:exercise_title_cont, t('activerecord.attributes.request_for_comments.exercise'), class: 'visually-hidden form-label')
+        = f.search_field(:exercise_title_cont, class: 'form-control', placeholder: t('activerecord.attributes.request_for_comments.exercise'))
+      .col-auto.mt-3.mt-md-0
+        = f.label(:title_cont,  t('request_for_comments.solved'), class: 'visually-hidden form-label')
+        = f.select(:solved_not_eq,  [[t('request_for_comments.show_all'), 2], [t('request_for_comments.show_unsolved'), 1], [t('request_for_comments.show_solved'), 0]])
+    .row
+      .col
+        = f.label(:submission_study_group_id_eq,  t('request_for_comments.index.study_groups.placeholder'), class: 'visually-hidden form-label')
+        = f.grouped_collection_select(:submission_study_group_id_in, @study_groups_grouping, :second, :first, :id, :to_s, {},
+                { class: 'form-control', multiple: true, "data-placeholder": t('request_for_comments.index.study_groups.placeholder') })
 
 .table-responsive
   table.table.sortable.mt-4
diff --git a/app/views/request_for_comments/show.html.slim b/app/views/request_for_comments/show.html.slim
index c43d4467..aaaf578a 100644
--- a/app/views/request_for_comments/show.html.slim
+++ b/app/views/request_for_comments/show.html.slim
@@ -56,7 +56,7 @@
     - if @current_user.admin? && user.is_a?(ExternalUser)
       = render('admin_menu')
 
-    hr/
+    hr
 
     .howto
       h5.mt-4
@@ -70,8 +70,8 @@
   | also, all settings from the rails model needed for the editor configuration in the JavaScript are attached to the editor as data attributes here.
 - submission.files.each do |file|
   = (file.path or "") + "/" + file.name +  file.file_type.file_extension
-  br/
-  |   
+  br
+  | &nbsp;&nbsp;
   i.fa-solid.fa-arrow-down aria-hidden="true"
   = t('request_for_comments.click_here')
   #commentitor.editor data-file-id="#{file.id}" data-mode="#{file.file_type.editor_mode}" data-read-only="true"
@@ -448,11 +448,11 @@ javascript:
       if (commenttext !== "") {
         createComment(fileid, row, editor, commenttext);
         commentTextarea.val('') ;
-        commentModal.modal('hide');
+        bootstrap.Modal.getInstance(commentModal).hide();
       }
     });
 
-    commentModal.modal('show');
+    new bootstrap.Modal(commentModal).show();
   }
 
   function ajaxError(response) {
diff --git a/app/views/sessions/new.html.slim b/app/views/sessions/new.html.slim
index d2cf3211..d7ce1e31 100644
--- a/app/views/sessions/new.html.slim
+++ b/app/views/sessions/new.html.slim
@@ -1,16 +1,16 @@
 h1 = t('.headline')
 
 = form_tag(sessions_path) do
-  .form-group
+  .mb-3
     = label_tag(:email, t('activerecord.attributes.internal_user.email'))
     = email_field_tag(:email, params[:email], autofocus: true, class: 'form-control', required: true)
-  .form-group
+  .mb-3
     = label_tag(:password, t('activerecord.attributes.internal_user.password'))
     = password_field_tag(:password, nil, class: 'form-control', required: true)
-  .form-check.form-group
+  .form-check.mb-3
     label.form-check-label
       // Set values 1 and true/false explicit to allow passing a custom HTML class
       = check_box_tag(:remember_me, 1, true, class: 'form-check-input')
       = t('.remember_me')
-    span.float-right = link_to(t('.forgot_password'), forgot_password_path)
+    span.float-end = link_to(t('.forgot_password'), forgot_password_path)
   .actions = submit_tag(t('.link'), class: 'btn btn-primary')
diff --git a/app/views/shared/_edit_button.html.slim b/app/views/shared/_edit_button.html.slim
index a0c4bd21..33d1bf41 100644
--- a/app/views/shared/_edit_button.html.slim
+++ b/app/views/shared/_edit_button.html.slim
@@ -1,4 +1,4 @@
 - if policy(object).edit?
   // default value for fetch will always be evaluated even if it is not returned
   - link_target = local_assigns.fetch(:path, false) || send(:"edit_#{object.class.name.underscore}_path", object)
-  = link_to(t('shared.edit'), link_target, class: 'btn btn-secondary float-right')
+  = link_to(t('shared.edit'), link_target, class: 'btn btn-secondary float-end')
diff --git a/app/views/shared/_form_filters.html.slim b/app/views/shared/_form_filters.html.slim
index 3a3afb90..7f19280f 100644
--- a/app/views/shared/_form_filters.html.slim
+++ b/app/views/shared/_form_filters.html.slim
@@ -1,11 +1,10 @@
-.card.card-body.bg-light.flex-row.container.row.mx-0
-  = search_form_for(@search, class: 'clearfix filter-form form-inline w-100') do |f|
-    .col-sm.p-0
-      = yield(f)
-    .col-sm-auto.p-0
-      .btn-group.ml-auto
+.card.card-body.bg-light.flex-row.container.justify-content-center
+  = search_form_for(@search, class: 'clearfix filter-form align-items-center row g-2 w-100') do |f|
+    = yield(f)
+    .col-sm.ge-4.gy-2
+      .btn-group.float-end.ms-auto.text-nowrap
         button.btn.btn-primary type='submit' = t('shared.apply_filters')
-        button.btn.btn-primary.dropdown-toggle data-toggle='dropdown' type='button'
+        button.btn.btn-primary.dropdown-toggle data-bs-toggle='dropdown' type='button'
         ul.dropdown-menu role='menu'
           li
             a.dropdown-item href=request.path = t('shared.reset_filters')
diff --git a/app/views/shared/_modal.html.slim b/app/views/shared/_modal.html.slim
index afddbea8..97d6fb1c 100644
--- a/app/views/shared/_modal.html.slim
+++ b/app/views/shared/_modal.html.slim
@@ -3,9 +3,8 @@
     .modal-content
       .modal-header
         h4#modal-title.modal-title = title
-        button.close data-dismiss='modal' type='button'
-          span aria-hidden=true &times;
-          span.sr-only Close
+        button.btn-close data-bs-dismiss='modal' type='button'
+          span.visually-hidden Close
       .modal-body
         - if local_assigns.has_key?(:body)
           = body
diff --git a/app/views/statistics/activity_history.html.slim b/app/views/statistics/activity_history.html.slim
index 7e1435db..da9a50c9 100644
--- a/app/views/statistics/activity_history.html.slim
+++ b/app/views/statistics/activity_history.html.slim
@@ -11,13 +11,13 @@
   .spinner
   .graph id="#{resource}-activity-history"
   form
-    .form-group
+    .mb-3
       label for="from-date" = t('.from')
       input type="date" class="form-control" id="from-date" name="from" value=(params[:from] || DateTime.new(2016).to_date)
-    .form-group
+    .mb-3
       label for="to-date" = t('.to')
       input type="date" class="form-control" id="to-date" name="to" value=(params[:to] || DateTime.now.to_date)
-    .form-group
+    .mb-3
       label for="interval" = t('.interval')
       select class="form-control" id="interval" name="interval"
         = [:year, :quarter, :month, :day, :hour, :minute, :second].each do | key |
diff --git a/app/views/study_groups/_form.html.slim b/app/views/study_groups/_form.html.slim
index 1872cdc5..b0e705fc 100644
--- a/app/views/study_groups/_form.html.slim
+++ b/app/views/study_groups/_form.html.slim
@@ -1,7 +1,7 @@
 = form_for(@study_group) do |f|
   = render('shared/form_errors', object: @study_group)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
 
   h3 = t('activerecord.attributes.study_group.members')
@@ -13,7 +13,7 @@
           th = sort_link(@search, :name, t('navigation.sections.users'))
       = collection_check_boxes :study_group, :study_group_membership_ids, @members, :id, :id do |b|
         tr
-          td = b.check_box
+          td = b.check_box class: 'form-check-input'
           td = link_to_if(policy(b.object.user).show?, b.object.user.displayname, b.object.user)
 
   .actions = render('shared/submit_button', f: f, object: @study_group)
diff --git a/app/views/study_groups/index.html.slim b/app/views/study_groups/index.html.slim
index af0ba826..ae41914a 100644
--- a/app/views/study_groups/index.html.slim
+++ b/app/views/study_groups/index.html.slim
@@ -1,13 +1,12 @@
 h1 = StudyGroup.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:consumer_id_eq, t('activerecord.attributes.internal_user.consumer'), class: 'sr-only')
-      = f.collection_select(:consumer_id_eq, Consumer.with_study_groups, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.internal_user.consumer'))
-    .form-group
-      = f.label(:name_cont, t('activerecord.attributes.study_group.name'), class: 'sr-only')
-      = f.search_field(:name_cont, class: 'form-control', placeholder: t('activerecord.attributes.study_group.name'))
+  .col-auto
+    = f.label(:consumer_id_eq, t('activerecord.attributes.internal_user.consumer'), class: 'visually-hidden form-label')
+    = f.collection_select(:consumer_id_eq, Consumer.with_study_groups, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.internal_user.consumer'))
+  .col-auto
+    = f.label(:name_cont, t('activerecord.attributes.study_group.name'), class: 'visually-hidden form-label')
+    = f.search_field(:name_cont, class: 'form-control', placeholder: t('activerecord.attributes.study_group.name'))
 
 .table-responsive
   table.table.mt-4
diff --git a/app/views/submissions/index.html.slim b/app/views/submissions/index.html.slim
index 3b922b82..d1a46ab7 100644
--- a/app/views/submissions/index.html.slim
+++ b/app/views/submissions/index.html.slim
@@ -1,13 +1,12 @@
 h1 = Submission.model_name.human(count: 2)
 
 = render(layout: 'shared/form_filters') do |f|
-  .row.px-3
-    .form-group
-      = f.label(:exercise_id_eq, t('activerecord.attributes.submission.exercise'), class: 'sr-only')
-      = f.collection_select(:exercise_id_eq, Exercise.with_submissions, :id, :title, class: 'form-control', prompt: t('activerecord.attributes.submission.exercise'))
-    .form-group
-      = f.label(:cause_eq, t('activerecord.attributes.submission.cause'), class: 'sr-only')
-      = f.select(:cause_eq, Submission.select(:cause).distinct.map(&:cause).sort, class: 'form-control', prompt: t('activerecord.attributes.submission.cause'))
+  .col-auto
+    = f.label(:exercise_id_eq, t('activerecord.attributes.submission.exercise'), class: 'visually-hidden form-label')
+    = f.collection_select(:exercise_id_eq, Exercise.with_submissions, :id, :title, class: 'form-control', prompt: t('activerecord.attributes.submission.exercise'))
+  .col-auto
+    = f.label(:cause_eq, t('activerecord.attributes.submission.cause'), class: 'visually-hidden form-label')
+    = f.select(:cause_eq, Submission.select(:cause).distinct.map(&:cause).sort, class: 'form-control', prompt: t('activerecord.attributes.submission.cause'))
 
 .table-responsive
   table.table.mt-4
diff --git a/app/views/tags/_form.html.slim b/app/views/tags/_form.html.slim
index 4f02a28f..14763915 100644
--- a/app/views/tags/_form.html.slim
+++ b/app/views/tags/_form.html.slim
@@ -1,6 +1,6 @@
 = form_for(@tag) do |f|
   = render('shared/form_errors', object: @tag)
-  .form-group
-    = f.label(:name)
+  .mb-3
+    = f.label(:name, class: 'form-label')
     = f.text_field(:name, class: 'form-control', required: true)
   .actions = render('shared/submit_button', f: f, object: @tag)
diff --git a/app/views/tips/_collapsed_card.html.slim b/app/views/tips/_collapsed_card.html.slim
index 9aaf2782..4c2adaee 100644
--- a/app/views/tips/_collapsed_card.html.slim
+++ b/app/views/tips/_collapsed_card.html.slim
@@ -3,7 +3,7 @@
 .card class="#{exercise_tip.parent_exercise_tip_id? || exercise_tip.rank != 1 ? 'mt-2' : ''}"
   .card-header.p-2 id="tip-heading-#{exercise_tip.id}" role="tab"
     .card-title.mb-0
-      a.collapsed aria-controls="tip-collapse-#{exercise_tip.id}" aria-expanded="false" data-parent="#tips" data-toggle="collapse" href="#tip-collapse-#{exercise_tip.id}"
+      a.collapsed aria-controls="tip-collapse-#{exercise_tip.id}" aria-expanded="false" data-bs-parent="#tips" data-bs-toggle="collapse" href="#tip-collapse-#{exercise_tip.id}"
         .clearfix role="button"
           i.fa-solid aria-hidden="true"
           span
diff --git a/app/views/tips/_form.html.slim b/app/views/tips/_form.html.slim
index d74f0603..1af4f291 100644
--- a/app/views/tips/_form.html.slim
+++ b/app/views/tips/_form.html.slim
@@ -1,16 +1,16 @@
 = form_for(@tip, builder: PagedownFormBuilder) do |f|
   = render('shared/form_errors', object: @tip)
-  .form-group
-    = f.label(:title)
+  .mb-3
+    = f.label(:title, class: 'form-label')
     = f.text_field(:title, class: 'form-control', required: false)
-  .form-group
-    = f.label(:description)
+  .mb-3
+    = f.label(:description, class: 'form-label')
     = f.pagedown :description, input_html: { preview: true, rows: 5 }
-  .form-group
-    = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'))
+  .mb-3
+    = f.label(:file_type_id, t('activerecord.attributes.file.file_type_id'), class: 'form-label')
     = f.collection_select(:file_type_id, @file_types, :id, :name, {include_blank: true}, class: 'form-control')
-  .form-group
-    = f.label(:example)
+  .mb-3
+    = f.label(:example, class: 'form-label')
     = f.text_area(:example, class: 'code-field form-control', rows: 5, style: "display:none;", required: false)
     #editor-edit.original-input data-file-id=@tip.id
       #frames
diff --git a/app/views/tips/_sortable_tip.html.slim b/app/views/tips/_sortable_tip.html.slim
index 183cd240..80587e0e 100644
--- a/app/views/tips/_sortable_tip.html.slim
+++ b/app/views/tips/_sortable_tip.html.slim
@@ -1,8 +1,8 @@
 - tip = exercise_tip.tip
 .list-group-item.d-block data-tip-id=tip.id data-id=exercise_tip.id
-  span.fa-solid.fa-bars.mr-3
+  span.fa-solid.fa-bars.me-3
   = tip.to_s
-  a.fa-regular.fa-eye.ml-2 href=tip_path(tip) target='_blank'
-  a.fa-solid.fa-xmark.ml-2.remove-tip href='#'
+  a.fa-regular.fa-eye.ms-2 href=tip_path(tip) target='_blank'
+  a.fa-solid.fa-xmark.ms-2.remove-tip href='#'
   .list-group.nested-sortable-list class="#{exercise_tip.children.present? ? 'mt-3' : ''}"
     = render(partial: 'tips/sortable_tip', collection: exercise_tip.children, as: :exercise_tip)
diff --git a/app/views/user_exercise_feedbacks/_form.html.slim b/app/views/user_exercise_feedbacks/_form.html.slim
index acb3cdf5..660b60bf 100644
--- a/app/views/user_exercise_feedbacks/_form.html.slim
+++ b/app/views/user_exercise_feedbacks/_form.html.slim
@@ -1,6 +1,6 @@
 = form_for(@uef) do |f|
   div
-    span.badge.badge-pill.badge-primary.float-right.score
+    span.badge.rounded-pill.bg-primary.float-end.score
 
     h1 id="exercise-headline"
       = t('activerecord.models.user_exercise_feedback.one') + " " + @exercise.title
@@ -10,7 +10,7 @@
   #description-card.lead.description-card
     u = t('activerecord.attributes.exercise.description')
     = render_markdown(@exercise.description)
-  .form-group
+  .mb-3
     = f.text_area(:feedback_text, class: 'form-control', required: true, :rows => "10")
     h4.mt-4 = t('user_exercise_feedback.difficulty')
     = f.collection_radio_buttons :difficulty, @texts, :first, :last  do |b|
diff --git a/package.json b/package.json
index 8de37fe4..3b800770 100644
--- a/package.json
+++ b/package.json
@@ -7,11 +7,12 @@
     "@babel/preset-env": "7",
     "@babel/runtime": "7",
     "@fortawesome/fontawesome-free": "^6.1.2",
+    "@popperjs/core": "^2.11.6",
     "@sentry/browser": "^6.11.0",
     "@webpack-cli/serve": "^1.7.0",
     "babel-loader": "8",
-    "bootstrap": "^4.6.2",
-    "bootswatch": "^4.6.0",
+    "bootstrap": "^5.2.0",
+    "bootswatch": "^5.2.0",
     "chosen-js": "^1.8.7",
     "compression-webpack-plugin": "9",
     "css-loader": "^6.7.1",
@@ -27,7 +28,6 @@
     "mini-css-extract-plugin": "^2.6.1",
     "opensans-webkit": "^1.1.0",
     "pnp-webpack-plugin": "1",
-    "popper.js": "^1.16.1",
     "rails-erb-loader": "^5.5.2",
     "sass": "^1.54.4",
     "sass-loader": "^13.0.2",
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index 4ec9e0db..28c172b0 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -83,7 +83,7 @@ describe ApplicationHelper do
     let(:html) { row(label: 'foo', value: 42) }
 
     it "builds nested 'div' tags" do
-      expect(html).to have_css('div.attribute-row.row div.col-sm-3 + div.col-sm-9')
+      expect(html).to have_css('div.attribute-row.row div.col-md-3 + div.col-md-9')
     end
   end
 
diff --git a/yarn.lock b/yarn.lock
index 8fb28aaa..06288e68 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -977,6 +977,11 @@
   resolved "https://registry.yarnpkg.com/@leichtgewicht/ip-codec/-/ip-codec-2.0.4.tgz#b2ac626d6cb9c8718ab459166d4bb405b8ffa78b"
   integrity sha512-Hcv+nVC0kZnQ3tD9GVu5xSMR4VVYOteQIr/hwFPVEvPdlXqgGEuRjiheChHgdM+JyqdgNcmzZOX/tnl0JOiI7A==
 
+"@popperjs/core@^2.11.6":
+  version "2.11.6"
+  resolved "https://registry.yarnpkg.com/@popperjs/core/-/core-2.11.6.tgz#cee20bd55e68a1720bdab363ecf0c821ded4cd45"
+  integrity sha512-50/17A98tWUfQ176raKiOGXuYpLyyVMkxxG6oylzL3BPOlA6ADGdK7EYunSa4I064xerltq9TGXs8HmOk5E+vw==
+
 "@sentry/browser@^6.11.0":
   version "6.19.7"
   resolved "https://registry.yarnpkg.com/@sentry/browser/-/browser-6.19.7.tgz#a40b6b72d911b5f1ed70ed3b4e7d4d4e625c0b5f"
@@ -1127,9 +1132,9 @@
   integrity sha512-Y4XFY5VJAuw0FgAqPNd6NNoV44jbq9Bz2L7Rh/J6jLTiHBSBJa9fxqQIvkIld4GsoDOcCbvzOUAbLPsSKKg+uA==
 
 "@types/node@*":
-  version "18.7.1"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-18.7.1.tgz#352bee64f93117d867d05f7406642a52685cbca6"
-  integrity sha512-GKX1Qnqxo4S+Z/+Z8KKPLpH282LD7jLHWJcVryOflnsnH+BtSDfieR6ObwBMwpnNws0bUK8GI7z0unQf9bARNQ==
+  version "18.7.2"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-18.7.2.tgz#22306626110c459aedd2cdf131c749ec781e3b34"
+  integrity sha512-ce7MIiaYWCFv6A83oEultwhBXb22fxwNOQf5DIxWA4WXvDQ7K+L0fbWl/YOfCzlR5B/uFkSnVBhPcOfOECcWvA==
 
 "@types/qs@*":
   version "6.9.7"
@@ -1521,15 +1526,15 @@ boolbase@^1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==
 
-bootstrap@^4.6.2:
-  version "4.6.2"
-  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.6.2.tgz#8e0cd61611728a5bf65a3a2b8d6ff6c77d5d7479"
-  integrity sha512-51Bbp/Uxr9aTuy6ca/8FbFloBUJZLHwnhTcnjIeRn2suQWsWzcuJhGjKDB5eppVte/8oCdOL3VuwxvZDUggwGQ==
+bootstrap@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-5.2.0.tgz#838727fb60f1630db370fe57c63cbcf2962bb3d3"
+  integrity sha512-qlnS9GL6YZE6Wnef46GxGv1UpGGzAwO0aPL1yOjzDIJpeApeMvqV24iL+pjr2kU4dduoBA9fINKWKgMToobx9A==
 
-bootswatch@^4.6.0:
-  version "4.6.2"
-  resolved "https://registry.yarnpkg.com/bootswatch/-/bootswatch-4.6.2.tgz#64720ddabec4fa154e7b760aaf7066d340174ea9"
-  integrity sha512-pHOS3d2yM/x9Y7/zwVzfGhGIIBdIa/rPwipghh756PaSNJS3ott/29d9uehakgze3pDvbH4FoQVjbho8wsLm6A==
+bootswatch@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/bootswatch/-/bootswatch-5.2.0.tgz#c02a0d84e0382552f8a7b9bdd055f36b758ffed9"
+  integrity sha512-v9krdPdybb5hUwVwlv3f7/FhOa5cXbCb5U5CI4gdnalcxR3ekclXE6kPZWL5O8V8qwNI9BB73apASO1MLmRpIA==
 
 brace-expansion@^1.1.7:
   version "1.1.11"
@@ -2275,9 +2280,9 @@ ee-first@1.1.1:
   integrity sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow==
 
 electron-to-chromium@^1.4.202:
-  version "1.4.215"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.215.tgz#553372e74bde3164290d61f6792f93e443b16733"
-  integrity sha512-vqZxT8C5mlDZ//hQFhneHmOLnj1LhbzxV0+I1yqHV8SB1Oo4Y5Ne9+qQhwHl7O1s9s9cRuo2l5CoLEHdhMTwZg==
+  version "1.4.217"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.217.tgz#f1f51b319435f4c1587a850806a0dfebe9774598"
+  integrity sha512-iX8GbAMij7cOtJPZo02CClpaPMWjvN5meqXiJXkBgwvraNWTNH0Z7F9tkznI34JRPtWASoPM/xWamq3oNb49GA==
 
 emitter-component@^1.1.1:
   version "1.1.1"
@@ -3346,11 +3351,6 @@ pnp-webpack-plugin@1:
   dependencies:
     ts-pnp "^1.1.6"
 
-popper.js@^1.16.1:
-  version "1.16.1"
-  resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.16.1.tgz#2a223cb3dc7b6213d740e40372be40de43e65b1b"
-  integrity sha512-Wb4p1J4zyFTbM+u6WuO4XstYx4Ky9Cewe4DWrel7B0w6VVICvPwdOpotjzcf6eD8TsckVnIMNONQyPIUFOUbCQ==
-
 postcss-calc@^8.2.3:
   version "8.2.4"
   resolved "https://registry.yarnpkg.com/postcss-calc/-/postcss-calc-8.2.4.tgz#77b9c29bfcbe8a07ff6693dc87050828889739a5"