diff --git a/layout/_partial/mathjax.ejs b/layout/_partial/mathjax.ejs
index 3c08d0684..1b537a258 100644
--- a/layout/_partial/mathjax.ejs
+++ b/layout/_partial/mathjax.ejs
@@ -15,5 +15,5 @@ MathJax.Hub.Queue(function() {
 });
 </script>
 
-<script src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
+<script src="//cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
 </script>