diff --git a/Gemfile.lock b/Gemfile.lock
index 6253088e..812bdaf2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,6 @@ GEM
     bootstrap-will_paginate (0.0.10)
       will_paginate
     builder (3.2.2)
-    byebug (4.0.5)
-      columnize (= 0.9.0)
     capistrano (3.3.5)
       capistrano-stats (~> 1.1.0)
       i18n
@@ -96,7 +94,6 @@ GEM
       execjs
     coffee-script-source (1.9.1)
     colorize (0.7.7)
-    columnize (0.9.0)
     concurrent-ruby (0.8.0)
       ref (~> 1.0, >= 1.0.5)
     concurrent-ruby (0.8.0-java)
@@ -110,6 +107,7 @@ GEM
       excon (>= 0.38.0)
       json
     erubis (2.7.0)
+    eventmachine (1.0.8)
     excon (0.45.2)
     execjs (2.5.2)
     factory_girl (4.5.0)
@@ -119,6 +117,9 @@ GEM
       railties (>= 3.0.0)
     faraday (0.9.1)
       multipart-post (>= 1.2, < 3)
+    faye-websocket (0.10.0)
+      eventmachine (>= 0.12.0)
+      websocket-driver (>= 0.5.1)
     ffi (1.9.8)
     ffi (1.9.8-java)
     forgery (0.6.0)
@@ -302,6 +303,9 @@ GEM
     thread_safe (0.3.5)
     thread_safe (0.3.5-java)
     tilt (1.4.1)
+    tubesock (0.2.5)
+      rack (>= 1.5.0)
+      websocket (>= 1.1.0)
     turbolinks (2.5.3)
       coffee-rails
     tzinfo (1.2.2)
@@ -315,6 +319,9 @@ GEM
       railties (>= 4.0)
       sprockets-rails (>= 2.0, < 4.0)
     websocket (1.2.1)
+    websocket-driver (0.6.2)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.2)
     will_paginate (3.0.7)
     xpath (2.0.0)
       nokogiri (~> 1.3)
@@ -330,7 +337,6 @@ DEPENDENCIES
   better_errors
   binding_of_caller
   bootstrap-will_paginate
-  byebug
   capistrano (~> 3.3.0)
   capistrano-rails
   capistrano-rvm
@@ -345,6 +351,7 @@ DEPENDENCIES
   database_cleaner
   docker-api (~> 1.21.1)
   factory_girl_rails (~> 4.0)
+  faye-websocket
   forgery
   highline
   ims-lti
@@ -375,6 +382,7 @@ DEPENDENCIES
   sorcery
   spring
   thread_safe
+  tubesock
   turbolinks
   uglifier (>= 1.3.0)
   web-console (~> 2.0)