diff --git a/Gemfile b/Gemfile
index 22408ed0e8280d12fa9f9fa2d985b8ea8900052b..03acee59791a06ffe1921f5fbf1525f755787a3f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -92,22 +92,21 @@ gem "js-routes",         "1.0.1"
 source "https://rails-assets.org" do
   gem "rails-assets-jquery",                              "1.11.2" # Should be kept in sync with jquery-rails
 
-  gem "rails-assets-markdown-it",                         "4.3.0"
+  gem "rails-assets-markdown-it",                         "4.4.0"
   gem "rails-assets-markdown-it-hashtag",                 "0.3.1"
   gem "rails-assets-markdown-it-diaspora-mention",        "0.3.0"
   gem "rails-assets-markdown-it-sanitizer",               "0.3.1"
   gem "rails-assets-markdown-it--markdown-it-for-inline", "0.1.1"
   gem "rails-assets-markdown-it-sub",                     "1.0.0"
   gem "rails-assets-markdown-it-sup",                     "1.0.0"
-  gem "rails-assets-highlightjs",                         "8.5.0"
+  gem "rails-assets-highlightjs",                         "8.6.0"
 
   # jQuery plugins
 
   gem "rails-assets-jeresig--jquery.hotkeys",       "0.2.0"
-  gem "rails-assets-jquery-idletimer",              "1.0.1"
-  gem "rails-assets-jquery-placeholder",            "2.1.1"
+  gem "rails-assets-jquery-placeholder",            "2.1.2"
   gem "rails-assets-jquery-textchange",             "0.2.3"
-  gem "rails-assets-perfect-scrollbar",             "0.6.2"
+  gem "rails-assets-perfect-scrollbar",             "0.6.3"
   gem "rails-assets-jakobmattsson--jquery-elastic", "1.6.11"
 end
 
@@ -286,7 +285,7 @@ group :development, :test do
   # Jasmine (client side application tests (JS))
   gem "jasmine",                   "2.2.0"
   gem "jasmine-jquery-rails",      "2.0.3"
-  gem "rails-assets-jasmine-ajax", "3.1.1", source: "https://rails-assets.org"
+  gem "rails-assets-jasmine-ajax", "3.2.0", source: "https://rails-assets.org"
   gem "sinon-rails",               "1.15.0"
 
   # silence assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 3c87d1f6e6ddc4fc8edca9ee9add1b80293b77c1..703cbebda72f29591d42aa09a3a65c2797199565 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -521,11 +521,11 @@ GEM
       rails-assets-jquery-fullscreen (~> 1.1.4)
       rails-assets-jquery-ui (~> 1.10.4)
       rails-assets-jquery.slimscroll (~> 1.3.3)
-    rails-assets-highlightjs (8.5.0)
+    rails-assets-highlightjs (8.6.0)
     rails-assets-jakobmattsson--jquery-elastic (1.6.11)
       rails-assets-jquery (>= 1.2.6)
     rails-assets-jasmine (2.3.4)
-    rails-assets-jasmine-ajax (3.1.1)
+    rails-assets-jasmine-ajax (3.2.0)
       rails-assets-jasmine (~> 2)
     rails-assets-jeresig--jquery.hotkeys (0.2.0)
       rails-assets-jquery (>= 1.4.2)
@@ -533,8 +533,7 @@ GEM
     rails-assets-jquery-colorbox (1.5.15)
       rails-assets-jquery (>= 1.3.2)
     rails-assets-jquery-fullscreen (1.1.4)
-    rails-assets-jquery-idletimer (1.0.1)
-    rails-assets-jquery-placeholder (2.1.1)
+    rails-assets-jquery-placeholder (2.1.2)
       rails-assets-jquery (>= 1.6)
     rails-assets-jquery-simulate (1.0.1)
     rails-assets-jquery-simulate-ext (1.3.0)
@@ -546,13 +545,13 @@ GEM
     rails-assets-jquery.slimscroll (1.3.6)
       rails-assets-jquery (>= 1.7)
     rails-assets-markdown-it--markdown-it-for-inline (0.1.1)
-    rails-assets-markdown-it (4.3.0)
+    rails-assets-markdown-it (4.4.0)
     rails-assets-markdown-it-diaspora-mention (0.3.0)
     rails-assets-markdown-it-hashtag (0.3.1)
     rails-assets-markdown-it-sanitizer (0.3.1)
     rails-assets-markdown-it-sub (1.0.0)
     rails-assets-markdown-it-sup (1.0.0)
-    rails-assets-perfect-scrollbar (0.6.2)
+    rails-assets-perfect-scrollbar (0.6.3)
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
     rails-dom-testing (1.0.6)
@@ -819,24 +818,23 @@ DEPENDENCIES
   rails (= 4.2.3)
   rails-assets-autosize (= 3.0.6)!
   rails-assets-diaspora_jsxc (~> 0.1.1)!
-  rails-assets-highlightjs (= 8.5.0)!
+  rails-assets-highlightjs (= 8.6.0)!
   rails-assets-jakobmattsson--jquery-elastic (= 1.6.11)!
-  rails-assets-jasmine-ajax (= 3.1.1)!
+  rails-assets-jasmine-ajax (= 3.2.0)!
   rails-assets-jeresig--jquery.hotkeys (= 0.2.0)!
   rails-assets-jquery (= 1.11.2)!
-  rails-assets-jquery-idletimer (= 1.0.1)!
-  rails-assets-jquery-placeholder (= 2.1.1)!
+  rails-assets-jquery-placeholder (= 2.1.2)!
   rails-assets-jquery-simulate (= 1.0.1)!
   rails-assets-jquery-simulate-ext (= 1.3.0)!
   rails-assets-jquery-textchange (= 0.2.3)!
-  rails-assets-markdown-it (= 4.3.0)!
+  rails-assets-markdown-it (= 4.4.0)!
   rails-assets-markdown-it--markdown-it-for-inline (= 0.1.1)!
   rails-assets-markdown-it-diaspora-mention (= 0.3.0)!
   rails-assets-markdown-it-hashtag (= 0.3.1)!
   rails-assets-markdown-it-sanitizer (= 0.3.1)!
   rails-assets-markdown-it-sub (= 1.0.0)!
   rails-assets-markdown-it-sup (= 1.0.0)!
-  rails-assets-perfect-scrollbar (= 0.6.2)!
+  rails-assets-perfect-scrollbar (= 0.6.3)!
   rails-i18n (= 4.0.4)
   rails-timeago (= 2.11.0)
   rails_admin (= 0.6.8)
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index 58f9db6884245d60f00e7a9e14bee81f8f5d47fa..5fe54a767de7a49e1c5ccdc997f1df243b820d34 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -17,7 +17,6 @@
 //= require jquery.events.input
 //= require jakobmattsson-jquery-elastic
 //= require jquery.mentionsInput
-//= require jquery-idletimer/dist/idle-timer
 //= require jquery.infinitescroll-custom
 //= require jquery.autocomplete-custom
 //= require jquery-ui/core