diff --git a/book/_config.yml b/book/_config.yml
index 7ae925d..7df42ac 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -17,8 +17,6 @@ sphinx:
   - teachbooks_favourites
   - teachbooks_sphinx_grasple
   - sphinx_apa_references
-  - sphinx_gated_directives
-  - sphinx_sticky_margin
   config:
     language: en
     html_js_files: