diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..151cc946
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,15 @@
+[submodule "backend/core"]
+	path = backend/core
+	url = https://github.com/crawlab-team/crawlab-core
+[submodule "backend/db"]
+	path = backend/db
+	url = https://github.com/crawlab-team/crawlab-db
+[submodule "backend/fs"]
+	path = backend/fs
+	url = https://github.com/crawlab-team/crawlab-fs
+[submodule "backend/vcs"]
+	path = backend/vcs
+	url = https://github.com/crawlab-team/crawlab-vcs
+[submodule "backend/log"]
+	path = backend/log
+	url = https://github.com/crawlab-team/crawlab-log
diff --git a/backend/apps/api.go b/backend/apps/api.go
index 67e86ba1..11b1b2b2 100644
--- a/backend/apps/api.go
+++ b/backend/apps/api.go
@@ -37,7 +37,7 @@ func (app *Api) Init() {
 	_ = app.initModule("redis", redis.InitRedis)
 
 	// initialize model services
-	_ = app.initModule("modeServices", models.InitModelServices)
+	_ = app.initModule("mode-services", models.InitModelServices)
 
 	// initialize controllers
 	_ = app.initModule("controllers", controllers.InitControllers)