diff --git a/.gitmodules b/.gitmodules
index f46e4e64ce..98c4a91ad1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -104,8 +104,8 @@
 	branch = release/2.1
 [submodule "modules/KestrelHttpServer"]
 	path = modules/KestrelHttpServer
-	url = https://github.com/aspnet/KestrelHttpServer.git
-	branch = release/2.1
+	url = https://github.com/aspnet/KestrelHttpServer-Private.git
+	branch = release/2.1-msrc
 [submodule "modules/Localization"]
 	path = modules/Localization
 	url = https://github.com/aspnet/Localization.git
diff --git a/modules/KestrelHttpServer b/modules/KestrelHttpServer
index 3ab8461a8c..b0e1fa5e30 160000
--- a/modules/KestrelHttpServer
+++ b/modules/KestrelHttpServer
@@ -1 +1 @@
-Subproject commit 3ab8461a8c771d20886f519f4134aec92a86535b
+Subproject commit b0e1fa5e30fd3da74273d5117226f9a6073e8257