diff --git a/book/_config.yml b/book/_config.yml
index d25d99d..6ad58d4 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -43,6 +43,8 @@ sphinx:
     - download_link_replacer
     - sphinx.ext.extlinks
     - sphinx_image_inverter
+    - sphinx_exercise
+    - teachbooks_sphinx_tippy
 
 bibtex_bibfiles: 
   - references.bib