diff --git a/compose.yml b/compose.yml
index 1796026..5d0757c 100644
--- a/compose.yml
+++ b/compose.yml
@@ -93,7 +93,7 @@ services:
     networks:
       - internal
     environment:
-      - POSTGRES_DB= mailman
+      - POSTGRES_DB=mailman
       - POSTGRES_USER=mailman
       - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
     volumes: