diff --git a/book/external/Nested-Books b/book/external/Nested-Books
index f063877..94d5835 160000
--- a/book/external/Nested-Books
+++ b/book/external/Nested-Books
@@ -1 +1 @@
-Subproject commit f063877cc9efa7bd1d14eab0cba71f50e4aeb957
+Subproject commit 94d583570178ede097f8216b2aa06996d6e4b9ee