diff --git a/themes/hugo-book b/themes/hugo-book
index 836a8a8..2687e34 160000
--- a/themes/hugo-book
+++ b/themes/hugo-book
@@ -1 +1 @@
-Subproject commit 836a8a82d660c673b6705bdb5c7d79a262b65981
+Subproject commit 2687e34ac095411f0517d97f9ca2cc841d664b29