diff --git a/mkdocs.yml b/mkdocs.yml
index 5df290d..fdb8856 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -84,7 +84,6 @@ extra_css:
 
 extra_javascript:
   - javascripts/config.js
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
   #- https://unpkg.com/mermaid@10.9.0/dist/mermaid.min.js