diff --git a/lib/daimon_markdown/plugin/math.rb b/lib/daimon_markdown/plugin/math.rb
index fe0ab5d..077b15a 100644
--- a/lib/daimon_markdown/plugin/math.rb
+++ b/lib/daimon_markdown/plugin/math.rb
@@ -14,7 +14,7 @@ def self.script_tag
         </script>
         <script type="text/javascript"
                 async
-                src="https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_CHTML">
+                src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_CHTML">
         </script>
         TAG
         if tag.respond_to?(:html_safe)