diff --git a/mkdocs.yaml b/mkdocs.yaml
index e1e5301..7c544b6 100644
--- a/mkdocs.yaml
+++ b/mkdocs.yaml
@@ -68,6 +68,7 @@ markdown_extensions:
       pygments_lang_class: true
   - pymdownx.inlinehilite
   - pymdownx.superfences
+  - pymdownx.extra
   - pymdownx.tabbed: # content tabs
       alternate_style: true
   - toc: