diff --git a/docker-compose.swarm.portainer.yml b/docker-compose.swarm.portainer.yml
index b17abe7..080c0c1 100644
--- a/docker-compose.swarm.portainer.yml
+++ b/docker-compose.swarm.portainer.yml
@@ -316,6 +316,8 @@ services:
       SANDBOX_ENABLED: "true"
       # API key for authenticating requests from the web proxy
       ORCHESTRATOR_API_KEY: ${ORCHESTRATOR_API_KEY}
+      # Prisma database connection (uses the shared openbrain postgres)
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@openbrain_brain-db:5432/${POSTGRES_DB:-mosaic}
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - orchestrator_workspace:/workspace
@@ -331,6 +333,7 @@ services:
       start_period: 40s
     networks:
       - internal
+      - openbrain_brain-internal
     cap_drop:
       - ALL
     cap_add:
@@ -403,6 +406,7 @@ services:
     networks:
       - internal
       - traefik-public
+      - openbrain_brain-internal
     deploy:
       restart_policy:
         condition: on-failure