diff --git a/roles/installer/defaults/main.yml b/roles/installer/defaults/main.yml
index a28d357a..8eec7922 100644
--- a/roles/installer/defaults/main.yml
+++ b/roles/installer/defaults/main.yml
@@ -151,7 +151,7 @@ tower_postgres_tolerations: ''
 tower_postgres_storage_requirements:
   requests:
     storage: 8Gi
-tower_postgres_resource_requirements: []
+tower_postgres_resource_requirements: {}
 tower_postgres_storage_class: ''
 tower_postgres_data_path: '/var/lib/postgresql/data/pgdata'