diff --git a/docker-compose.yml b/docker-compose.yml
index f15068b..c83485e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -30,6 +30,7 @@ services:
     environment:
       - DATASTORE_READONLY_PASSWORD=password
       - POSTGRES_PASSWORD=password
+      - PGDATA=/var/lib/postgresql/data/db
     logging:
       driver: none