diff --git a/.gitmodules b/.gitmodules
index c614602cb8eb8d00a69da64953de2b1b93d583b7..832698b8bfaa5e2275cb5202fb42abb9f3afce75 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "book"]
 	path = book
 	url = https://github.com/PaddlePaddle/book.git
+	branch = develop
\ No newline at end of file
diff --git a/book b/book
index 22ed2a01aee872f055b5f5f212428f481cefc10d..6e3875eb62533de1f2c1088a477719eb57b9732c 160000
--- a/book
+++ b/book
@@ -1 +1 @@
-Subproject commit 22ed2a01aee872f055b5f5f212428f481cefc10d
+Subproject commit 6e3875eb62533de1f2c1088a477719eb57b9732c