diff --git a/_includes/head.html b/_includes/head.html
index e32b576a..21b75ae8 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -9,6 +9,10 @@
 <meta name="MobileOptimized" content="320">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+<script>
+  document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/g, '') + ' js ';
+</script>
+
 <!-- For all browsers -->
 <link rel="stylesheet" href="{{ base_path }}/assets/css/main.css">