diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index 70dfd28..9436769 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit 70dfd28f5f288118bb75d219b809f03474aa89a2
+Subproject commit 943676969d6e42b9c6d9c25d5313d9c0fbceea97