diff --git a/.gitmodules b/.gitmodules
index 76e4f11..329596f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "drucker/grpc"]
 	path = drucker/grpc
 	url = https://github.com/drucker/drucker-grpc-proto.git
-	branch = master
+	branch = v0.4.0