diff --git a/Gemfile b/Gemfile
index d1dfeaac69c676697d9aa3a528b5a4c7a652f127..15cc120a83307be9e32bb95a48803df312a20be6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -99,7 +99,7 @@ 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",                         "8.5.0"
+  gem "rails-assets-highlightjs",                         "8.6.0"
 
   # jQuery plugins
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 9efbfa1442c60de341b276f825a0b6b9f5818c8f..199cc0e07cc71686266dd45d4d5662c907b063d5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -521,7 +521,7 @@ 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)
@@ -819,7 +819,7 @@ 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-jeresig--jquery.hotkeys (= 0.2.0)!