diff --git a/src/doc/book b/src/doc/book
index 616fe4172b688..74d81d80052cb 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit 616fe4172b688393aeee5f34935cc25733c9c062
+Subproject commit 74d81d80052cb88925f0e73b12fbd0b73ab7b5a0