diff --git a/book/external/teachbooks-sphinx-tippy b/book/external/teachbooks-sphinx-tippy
index a80e764..3f9a5c2 160000
--- a/book/external/teachbooks-sphinx-tippy
+++ b/book/external/teachbooks-sphinx-tippy
@@ -1 +1 @@
-Subproject commit a80e7645bc5a377b3c75befdf29eb67934bb9ab7
+Subproject commit 3f9a5c2a72607d5e32c3a99649f37a5e6548e92a