diff --git a/themes/book b/themes/book
index b30cf46..22f271b 160000
--- a/themes/book
+++ b/themes/book
@@ -1 +1 @@
-Subproject commit b30cf46c6c0bb8a191c849f9c0a69c00c028c08c
+Subproject commit 22f271b8fd81ec92ea89a7e6678dc608011f8a5b