diff --git a/.github/workflows/publish-docs.yml b/.github/workflows/publish-docs.yml
index 78c6889..c1575b1 100644
--- a/.github/workflows/publish-docs.yml
+++ b/.github/workflows/publish-docs.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.11"]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
diff --git a/mkdocs.yml b/mkdocs.yml
index 4c0a2db..87d54ac 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -55,7 +55,6 @@ extra_javascript:
   - javascripts/config.js
   - https://cdnjs.cloudflare.com/ajax/libs/tablesort/5.2.1/tablesort.min.js
   - javascripts/tables.js
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 extra_css:
   - stylesheets/extra.css