diff --git a/themes/book b/themes/book
index 1e4bcc2..a656d71 160000
--- a/themes/book
+++ b/themes/book
@@ -1 +1 @@
-Subproject commit 1e4bcc2cc3186794c1becbe0a0d9c924264d0146
+Subproject commit a656d711bf1316ed16208d0b3ceb8b8ef5f626cf