diff --git a/book/external/teachbooks-sphinx-tippy b/book/external/teachbooks-sphinx-tippy
index 2587124..304a1dc 160000
--- a/book/external/teachbooks-sphinx-tippy
+++ b/book/external/teachbooks-sphinx-tippy
@@ -1 +1 @@
-Subproject commit 25871247d320ef9661df4246bee26c572aec6cd8
+Subproject commit 304a1dcd6bdf6ce3501eb46d55fcc9216db0d334