diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
index 08538ef..c75d332 100644
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -61,6 +61,8 @@ services:
       - maps-net
     ports:
       - "3001:3001"
+    environment:
+      DATABASE_URL: "postgres://maps:maps@postgres:5432/maps"
     command: ["--listen-addresses", "0.0.0.0:3001"]
     depends_on:
       - postgres