diff --git a/docker-compose.yml b/docker-compose.yml
index 1fa3b87..c24fbb3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3.1'
-
 services:
   mongo:
     image: docker.io/mongo
@@ -14,8 +12,6 @@ services:
     volumes:
       - ./:/opt/keyfile/
       - mongo:/data/db
-    groups:
-      - 999
 
 volumes:
   mongo: