diff --git a/layouts/partials/mathjax.html b/layouts/partials/mathjax.html
index 386b8d7..143f716 100644
--- a/layouts/partials/mathjax.html
+++ b/layouts/partials/mathjax.html
@@ -1,5 +1,5 @@
 <!-- From https://note.qidong.name/2018/03/hugo-mathjax/ -->
-<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+<script src="https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js"></script>
 <script>
 MathJax = {
   tex: {