diff --git a/compose.yml b/compose.yml
index 10ca39f..bc9219d 100644
--- a/compose.yml
+++ b/compose.yml
@@ -90,9 +90,9 @@ services:
     networks:
       - internal
     environment:
-      POSTGRES_DB: mailman
-      POSTGRES_USER: mailman
-      POSTGRES_PASSWORD_FILE: /run/secrets/db_password
+      - POSTGRES_DB= mailman
+      - POSTGRES_USER=mailman
+      - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
     volumes:
       - "db:/var/lib/postgresql/data"