diff --git a/template/docs/mkdocs.yml.jinja b/template/docs/mkdocs.yml.jinja
index af3a820..15ffe11 100644
--- a/template/docs/mkdocs.yml.jinja
+++ b/template/docs/mkdocs.yml.jinja
@@ -98,6 +98,9 @@ extra:
 # Customization to be included by the theme
 extra_css:
   - assets/stylesheets/extra.css
+  # ipywidgets resolves its bundled Font Awesome fonts relative to the generated HTML
+  # page, where they do not exist. Load the font from CDN so widget icons render.
+  - https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css
 
 extra_javascript:
   - assets/javascripts/extra.js