diff --git a/Gemfile b/Gemfile
index 4c56426d1..2398d32ae 100644
--- a/Gemfile
+++ b/Gemfile
@@ -100,7 +100,7 @@ source "https://rails-assets.org" do
   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",                         "9.2.0"
+  gem "rails-assets-highlightjs",                         "9.4.0"
 
   # jQuery plugins
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d37ec1308..4da8cb6fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -572,7 +572,7 @@ GEM
       rails-assets-jquery.slimscroll (~> 1.3.6)
       rails-assets-jquery.ui (~> 1.11.4)
     rails-assets-favico.js (0.3.10)
-    rails-assets-highlightjs (9.2.0)
+    rails-assets-highlightjs (9.4.0)
     rails-assets-jakobmattsson--jquery-elastic (1.6.11)
       rails-assets-jquery (>= 1.2.6)
     rails-assets-jasmine (2.4.1)
@@ -875,7 +875,7 @@ DEPENDENCIES
   rack-ssl (= 1.4.1)
   rails (= 4.2.6)
   rails-assets-diaspora_jsxc (= 0.1.4)!
-  rails-assets-highlightjs (= 9.2.0)!
+  rails-assets-highlightjs (= 9.4.0)!
   rails-assets-jakobmattsson--jquery-elastic (= 1.6.11)!
   rails-assets-jasmine-ajax (= 3.2.0)!
   rails-assets-jeresig--jquery.hotkeys (= 0.2.0)!