diff --git a/themes/book b/themes/book
index 22f271b..c008460 160000
--- a/themes/book
+++ b/themes/book
@@ -1 +1 @@
-Subproject commit 22f271b8fd81ec92ea89a7e6678dc608011f8a5b
+Subproject commit c0084602cea8f33b609e04e3d00809b5401e90ec