diff --git a/themes/hugo-book b/themes/hugo-book
index 7b5d299..3f1bccc 160000
--- a/themes/hugo-book
+++ b/themes/hugo-book
@@ -1 +1 @@
-Subproject commit 7b5d299b7bc8a51b3e564a840eb2205ef2b67c4e
+Subproject commit 3f1bcccbfb247da44ab5410a97576c0bf6da103b