diff --git a/themes/hugo-book b/themes/hugo-book
index 81a841c..ae912cc 160000
--- a/themes/hugo-book
+++ b/themes/hugo-book
@@ -1 +1 @@
-Subproject commit 81a841c92d62f2ed8d9134b0b18623b8b2471661
+Subproject commit ae912cc38d3f77d928b5c1f8f1a3c0575bf3415a