diff --git a/app/views/exercises/show.html.slim b/app/views/exercises/show.html.slim
index b52df66b..6456c3c0 100644
--- a/app/views/exercises/show.html.slim
+++ b/app/views/exercises/show.html.slim
@@ -1,6 +1,6 @@
 - content_for :head do
-  = javascript_include_tag('http://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.1/highlight.min.js')
-  = stylesheet_link_tag('http://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.1/styles/default.min.css')
+  = javascript_include_tag('http://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/highlight.min.js')
+  = stylesheet_link_tag('http://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/styles/default.min.css')
 
 h1
   = @exercise