diff --git a/ansible/playbooks/universe.yaml b/ansible/playbooks/universe.yaml
index d8b40d7c311..4ca6a336e9b 100644
--- a/ansible/playbooks/universe.yaml
+++ b/ansible/playbooks/universe.yaml
@@ -16,7 +16,7 @@
       prompt: |-
         [Warning] ROS 2 is required for Autoware. Please refer to https://docs.ros.org/en/humble/Installation.html for more information.
         Install ROS 2? [y/N]
-      default: 'y'
+      default: "y"
       private: false
   pre_tasks:
     - name: Verify OS