diff --git a/src/doxide.cpp b/src/doxide.cpp
index f5a2e07..84fe57e 100644
--- a/src/doxide.cpp
+++ b/src/doxide.cpp
@@ -52,7 +52,6 @@ R""""(site_name:
   - stylesheets/doxide.css
 extra_javascript:
   - javascripts/mathjax.js
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 )"""";