diff --git a/compose/docker-compose.yml b/compose/docker-compose.yml
index c5c17b6..3ea6a4d 100644
--- a/compose/docker-compose.yml
+++ b/compose/docker-compose.yml
@@ -58,6 +58,7 @@ services:
       args:
         - DS_RO_PASS=${DATASTORE_READONLY_PASSWORD}
         - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+        - PGDATA=/var/lib/postgresql/data/db
     networks:
       - backend
     environment:
diff --git a/examples/harvest/docker-compose.yml b/examples/harvest/docker-compose.yml
index 7ad2d70..775e75c 100644
--- a/examples/harvest/docker-compose.yml
+++ b/examples/harvest/docker-compose.yml
@@ -156,6 +156,7 @@ services:
       args:
         - DS_RO_PASS=${DATASTORE_READONLY_PASSWORD}
         - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+        - PGDATA=/var/lib/postgresql/data/db
     networks:
       - backend
     environment:
diff --git a/examples/s3filestore/docker-compose.yml b/examples/s3filestore/docker-compose.yml
index 45d8359..d3bdb4c 100644
--- a/examples/s3filestore/docker-compose.yml
+++ b/examples/s3filestore/docker-compose.yml
@@ -61,6 +61,7 @@ services:
     environment:
       - DS_RO_PASS=${DATASTORE_READONLY_PASSWORD}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - PGDATA=/var/lib/postgresql/data/db
     volumes:
       - pg_data:/var/lib/postgresql/data
     healthcheck: