diff --git a/_includes/head.html b/_includes/head.html
index 4d7e8f00..74213329 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -8,4 +8,8 @@
 
     <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
     <link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}">
+  <!-- Math -->
+    <script type="text/javascript"
+      src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
+    </script>    
 </head>