diff --git a/modules/postgres/module.json b/modules/postgres/module.json
index 56dc81b..fcc2c2c 100644
--- a/modules/postgres/module.json
+++ b/modules/postgres/module.json
@@ -97,7 +97,7 @@
         "/var/lib/postgres/superuser.secret:/run/secrets/superuser:ro"
       ],
       "env": {
-        "MESH_PROVISION_POSTGRES": "postgres://postgres@127.0.0.1:5432/postgres?sslmode=disable",
+        "MESH_PROVISION_POSTGRES": "postgres://postgres@127.0.0.1:${seat:mesh-store:5432}/postgres?sslmode=disable",
         "MESH_PROVISION_PASSWORD_FILE": "/run/secrets/superuser",
         "MESH_BROKER_FILE": "/run/secrets/broker",
         "MESH_RECEIVES": "/var/lib/postgres/grants/mesh.json"