diff --git a/themes/book b/themes/book
index c008460..f8a0fc4 160000
--- a/themes/book
+++ b/themes/book
@@ -1 +1 @@
-Subproject commit c0084602cea8f33b609e04e3d00809b5401e90ec
+Subproject commit f8a0fc4e246c61cea8159d2d2955f488e7d13848