diff --git a/themes/hugo-book b/themes/hugo-book
index 118997f..2dffe0b 160000
--- a/themes/hugo-book
+++ b/themes/hugo-book
@@ -1 +1 @@
-Subproject commit 118997fa920e48acee7689fcf0cbb29d1b97ecb1
+Subproject commit 2dffe0bc7a5caac3e49bf2abe943ca412d5f4333