diff --git a/_includes/scripts/mathjax.liquid b/_includes/scripts/mathjax.liquid
index cf5b3a3..7a45483 100644
--- a/_includes/scripts/mathjax.liquid
+++ b/_includes/scripts/mathjax.liquid
@@ -13,5 +13,5 @@
     id="MathJax-script"
     src="https://cdn.jsdelivr.net/npm/mathjax@{{ site.mathjax.version }}/es5/tex-mml-chtml.js"
   ></script>
-  <script defer src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+  <script defer src="https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js?features=es6"></script>
 {% endif %}