diff --git a/src/ruby-rails-postgres/.devcontainer/docker-compose.yml b/src/ruby-rails-postgres/.devcontainer/docker-compose.yml
index a963103b..ef1eb42e 100644
--- a/src/ruby-rails-postgres/.devcontainer/docker-compose.yml
+++ b/src/ruby-rails-postgres/.devcontainer/docker-compose.yml
@@ -22,7 +22,7 @@ services:
     image: postgres:latest
     restart: unless-stopped
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres-data:/var/lib/postgresql
       - ./create-db-user.sql:/docker-entrypoint-initdb.d/create-db-user.sql
     environment:
       POSTGRES_USER: postgres