diff --git a/mkdocs.yml b/mkdocs.yml
index 83f6ead..1e7fa3e 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -46,6 +46,7 @@ theme:
   #logo: _static/videos/PSI_logo_A.mp4
 
 markdown_extensions:
+  - attr_list
   - pymdownx.highlight:
       anchor_linenums: true
       line_spans: __span