diff --git a/_layouts/default.html b/_layouts/default.html
index dc3ba38bac8..611aa2b5214 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -3,7 +3,7 @@
   <head>
     <meta charset='utf-8'>
     <meta http-equiv="X-UA-Compatible" content="chrome=1">
-    <link rel="stylesheet" href="{{ '/assets/css/style.css' | relative_url }}">
+    <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
     <title>{{ site.title | default: site.github.repository_name }} by {{ site.github.owner_name }}</title>
   </head>
 
