diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..d78dbc4b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "demo/cpp-server"]
+	path = demo/cpp-server
+	url = https://github.com/ZeldaHuang/rwkv-cpp-server.git
diff --git a/demo/cpp-server b/demo/cpp-server
new file mode 160000
index 00000000..b82805fc
--- /dev/null
+++ b/demo/cpp-server
@@ -0,0 +1 @@
+Subproject commit b82805fc4129297975c22c4a38914b9de7cb418f