diff --git a/mkdocs.yml b/mkdocs.yml
index bbeb52c4..5d29250f 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -62,6 +62,7 @@ theme:
 markdown_extensions:
   - attr_list
   - md_in_html
+  - footnotes
 
 plugins:
   - i18n: