diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a9ae513
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "protocol"]
+	path = protocol
+	url = https://git.hangman-lab.top/nav/Yonexus.Protocol.git
diff --git a/protocol b/protocol
new file mode 160000
index 0000000..9232aa7
--- /dev/null
+++ b/protocol
@@ -0,0 +1 @@
+Subproject commit 9232aa7c1755adda6990a5a2f6c7c1a114285a73