diff --git a/core/api_test.go b/core/api_test.go
index a0f883b..34310fd 100644
--- a/core/api_test.go
+++ b/core/api_test.go
@@ -21,7 +21,7 @@ func TestMakeLocalUniqueId(t *testing.T) {
 	fmt.Println(start.Time().Format(time.RFC3339))
 	fmt.Println(end.Time().Format(time.RFC3339))
 
-	mongoClient, err := gocommon.NewMongoClient(context.Background(), "mongodb://121.134.91.160:27018/?replicaSet=rs0&retrywrites=true", "mountain-maingate")
+	mongoClient, err := gocommon.NewMongoClient(context.Background(), "mongodb://121.134.91.160:27018/mountain-maingate?replicaSet=rs0&retrywrites=true")
 	if err != nil {
 		t.Error(err)
 	}
diff --git a/core/maingate.go b/core/maingate.go
index b5ab795..56ef3f8 100644
--- a/core/maingate.go
+++ b/core/maingate.go
@@ -300,7 +300,7 @@ func (mg *Maingate) prepare(context context.Context) (err error) {
 	}
 
 	// redis에서 env를 가져온 후에
-	mg.mongoClient, err = gocommon.NewMongoClient(context, mg.Mongo, "maingate")
+	mg.mongoClient, err = gocommon.NewMongoClient(context, mg.Mongo)
 	if err != nil {
 		return makeErrorWithStack(err)
 	}