diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index 83780bed..3df79531 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -716,7 +716,7 @@ var CodeOceanEditor = {
             this.showOutOfMemoryMessage();
         } else if (output.stderr) {
             $.flash.danger({
-                icon: ['fa', 'fa-bug'],
+                icon: ['fa-solid', 'fa-bug'],
                 text: $('#run').data('message-failure')
             });
             Sentry.captureException(JSON.stringify(output));
diff --git a/app/assets/javascripts/submission_statistics.js.erb b/app/assets/javascripts/submission_statistics.js.erb
index 99036c87..8659c0fb 100644
--- a/app/assets/javascripts/submission_statistics.js.erb
+++ b/app/assets/javascripts/submission_statistics.js.erb
@@ -108,7 +108,7 @@ $(document).on('turbolinks:load', function() {
     stopReplay = function() {
       clearInterval(playInterval);
       playInterval = undefined;
-      playButton.find('span.fa').removeClass('fa-pause').addClass('fa-play')
+      playButton.find('span.fa-solid').removeClass('fa-pause').addClass('fa-play')
     };
 
     playButton.on('click', function(event) {
@@ -127,7 +127,7 @@ $(document).on('turbolinks:load', function() {
             stopReplay();
           }
         }, 1000);
-        playButton.find('span.fa').removeClass('fa-play').addClass('fa-pause')
+        playButton.find('span.fa-solid').removeClass('fa-play').addClass('fa-pause')
       } else {
         stopReplay();
       }