diff --git a/book/external/Sphinx-TUDelft-theme b/book/external/Sphinx-TUDelft-theme
index 342056d..63a1a68 160000
--- a/book/external/Sphinx-TUDelft-theme
+++ b/book/external/Sphinx-TUDelft-theme
@@ -1 +1 @@
-Subproject commit 342056dbd4075674caefb4a340cfe2aef7139eca
+Subproject commit 63a1a68f702acddfdb3c8458a4c48797539ac309