diff --git a/docker-compose-parts/postgresql.yml b/docker-compose-parts/postgresql.yml
index 0ec4329..f493ff9 100644
--- a/docker-compose-parts/postgresql.yml
+++ b/docker-compose-parts/postgresql.yml
@@ -1,7 +1,7 @@
 version: '3.7'
 services:
   isard-sso-postgresql:
-    image: postgres:13.5-alpine3.15
+    image: ${POSTGRESQL_IMG-postgres:13.5-alpine3.15}
     container_name: isard-sso-postgresql
     restart: unless-stopped
     env_file: