diff --git a/example/templates/content.html b/example/templates/content.html
index 47fd8b1..b319081 100644
--- a/example/templates/content.html
+++ b/example/templates/content.html
@@ -12,7 +12,7 @@
   MathJax.Hub.Config({tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']]}});
 </script>
 <script type="text/javascript"
-  src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
+  src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
 </script>
 {% endif %}