diff --git a/mkdocs.yml b/mkdocs.yml
index 015db2181..c038cd43e 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -322,7 +322,6 @@ markdown_extensions:
   - footnotes
 
 extra_javascript:
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
   - js/custom.js