diff --git a/installer/local_docker/tasks/main.yml b/installer/local_docker/tasks/main.yml
index 56bb538e01..08c042ef75 100644
--- a/installer/local_docker/tasks/main.yml
+++ b/installer/local_docker/tasks/main.yml
@@ -101,7 +101,7 @@
     state: started
     image: postgres:9.6
     volumes:
-      - "{{ postgres_data_dir }}:/var/lib/postgresql/data"
+      - "{{ postgres_data_dir }}:/var/lib/postgresql/data:Z"
     env:
       POSTGRES_USER: "{{ pg_username }}"
       POSTGRES_PASSWORD: "{{ pg_password }}"