diff --git a/src/controllers/group.js b/src/controllers/group.js
index 25b5fee..373b500 100644
--- a/src/controllers/group.js
+++ b/src/controllers/group.js
@@ -45,8 +45,8 @@ class GroupController {
 
         let group = await GroupService.getByName(groupName);
 
-        return res.status(200).send(group.id);
+        return res.status(200).send(group.id.toString());
     }
 }
 
-export default new GroupController();
\ No newline at end of file
+export default new GroupController();