diff --git a/.gitmodules b/.gitmodules
index 69223156..d1734e3e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "protocol"]
 	path = protocol
-	url = https://github.com/apache/skywalking-data-collect-protocol
+	url = https://github.com/apache/skywalking-data-collect-protocol