diff --git a/tools/Hamud_Book b/tools/Hamud_Book
index 959acdda..81cbfd7f 160000
--- a/tools/Hamud_Book
+++ b/tools/Hamud_Book
@@ -1 +1 @@
-Subproject commit 959acddabd96c60863a8624f29c35866764fab23
+Subproject commit 81cbfd7f4773c6276f59af4faeaed1900be4869f