diff --git a/.gitmodules b/.gitmodules
index 9d669a9..4ed38a2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -31,3 +31,6 @@
 [submodule "book/external/Sphinx-TUDelft-theme"]
 	path = book/external/Sphinx-TUDelft-theme
 	url = https://github.com/TeachBooks/Sphinx-TUDelft-theme.git
+[submodule "book/external/teachbooks-sphinx-tippy"]
+	path = book/external/teachbooks-sphinx-tippy
+	url = https://github.com/TeachBooks/teachbooks-sphinx-tippy.git
diff --git a/book/_toc.yml b/book/_toc.yml
index 526d0e9..c4f00c6 100644
--- a/book/_toc.yml
+++ b/book/_toc.yml
@@ -48,6 +48,7 @@ parts:
       - file: external/Sphinx-Image-Inverter/README.md
       - file: external/JupyterBook-Patches/README.md
       - file: external/Sphinx-TUDelft-theme/README.md
+      - file: external/teachbooks-sphinx-tippy/README.md
       - file: features/interactive_element.ipynb
         sections:
         - file: external/Sphinx-Grasple-public/README.md
diff --git a/book/external/teachbooks-sphinx-tippy b/book/external/teachbooks-sphinx-tippy
new file mode 160000
index 0000000..2587124
--- /dev/null
+++ b/book/external/teachbooks-sphinx-tippy
@@ -0,0 +1 @@
+Subproject commit 25871247d320ef9661df4246bee26c572aec6cd8