diff --git a/.gitmodules b/.gitmodules
index b853892..0203211 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "robot"]
 	path = robot
 	url = http://123.207.52.103:3000/LiZongdi/robot.git
+	branch = master