diff --git a/.gitmodules b/.gitmodules
index 915b19cb1372..c3cd945b1818 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,9 +7,11 @@
 [submodule "sonic-sairedis"]
 	path = src/sonic-sairedis
 	url = https://github.com/Azure/sonic-sairedis
+	branch = 201811
 [submodule "sonic-swss"]
 	path = src/sonic-swss
 	url = https://github.com/Azure/sonic-swss
+	branch = 201811
 [submodule "src/p4c-bm/p4c-bm"]
 	path = platform/p4/p4c-bm/p4c-bm
 	url = https://github.com/krambn/p4c-bm