diff --git a/swarm/services.yml b/swarm/services.yml
index c203ec5..fa2123a 100644
--- a/swarm/services.yml
+++ b/swarm/services.yml
@@ -51,6 +51,9 @@ services:
     networks:
       - traefik-public
     deploy:
+      placement:
+        constraints:
+          - node.labels.postgres.postgres_data == true
       labels:
         - traefik.enable=true
         - traefik.docker.network=traefik-public