diff --git a/.gitignore b/.gitignore
index 60c52ee..7140179 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,4 +41,8 @@ yarn-error.log*
 # Prevent commiting  lock file.
 package-lock.json
 
-secret.json
\ No newline at end of file
+secret.json
+
+# sub module
+
+api-docs/
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f2bf7d3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "api-docs"]
+	path = api-docs
+	url = https://github.com/koreanbots/api-docs
diff --git a/api-docs b/api-docs
new file mode 160000
index 0000000..2ef14c2
--- /dev/null
+++ b/api-docs
@@ -0,0 +1 @@
+Subproject commit 2ef14c2afc5d539a011a6c48401962c5ffec1073
diff --git a/package.json b/package.json
index 58df43e..69351ea 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
 	"private": true,
 	"scripts": {
 		"dev": "next dev",
-		"build": "next build",
+		"pre-build": "git submodule init && git submodule update",
+		"build": "npm run pre-build && next build",
 		"start": "next start | (sleep 1; wget http://localhost:3000/api/v2 -O /dev/null)",
 		"lint": "eslint --ext ts,tsx .",
 		"prettier": "prettier --write **/*",