diff --git a/mkdocs.yml b/mkdocs.yml
index 6b4c2547..aebb1f64 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -43,7 +43,6 @@ strict: true  # Don't allow warnings during the build process
 extra_javascript: 
     # The below three make MathJax work, see https://squidfunk.github.io/mkdocs-material/reference/mathjax/
     - _static/mathjax.js
-    - https://polyfill.io/v3/polyfill.min.js?features=es6
     - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 
 extra_css: