diff --git a/.gitmodules b/.gitmodules
index 8b1378917..446b7535e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1 +1,4 @@
 
+[submodule "src/Open-IM-SDK-Core"]
+	path = src/Open-IM-SDK-Core
+	url = https://github.com/OpenIMSDK/Open-IM-SDK-Core.git
diff --git a/src/Open-IM-SDK-Core b/src/Open-IM-SDK-Core
new file mode 160000
index 000000000..3d956a1a4
--- /dev/null
+++ b/src/Open-IM-SDK-Core
@@ -0,0 +1 @@
+Subproject commit 3d956a1a40024f0a5f4959d6e46f6f503a1618ce