diff --git a/stacks/wordpress/docker-compose.yml b/stacks/wordpress/docker-compose.yml
index 1a57027..b241461 100644
--- a/stacks/wordpress/docker-compose.yml
+++ b/stacks/wordpress/docker-compose.yml
@@ -21,4 +21,4 @@ services:
        WORDPRESS_DB_PASSWORD: wordpress
 
 volumes:
-    db_data:
+    db_data: ${DB_VOL}