diff --git a/book/_config.yml b/book/_config.yml
index 1aaef84..2173637 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -42,6 +42,7 @@ sphinx:
     - sphinx_image_inverter
     - sphinx_exercise
     - sphinx_tudelft_theme
+    - teachbooks_sphinx_tippy
 
 bibtex_bibfiles: 
   - references.bib
diff --git a/requirements.txt b/requirements.txt
index 8060f9a..e6e056f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,8 +3,9 @@ teachbooks # depends on jupyter-book
 jupyterbook-patches
 sphinx-image-inverter
 download_link_replacer
-sphinx-tudelft-theme
 sphinx-exercise
+sphinx-tudelft-theme
+teachbooks-sphinx-tippy
 
 # now list the packages (and the respective url) you wish to download from the GitLab package registry
 --extra-index-url https://gitlab.tudelft.nl/api/v4/projects/11239/packages/pypi/simple