diff --git a/03-AdvancedPermissionsAndAccounts/04_Cross-AccountPermissions/01_DEMOSETUP/prod_bucketsandrole.yaml b/03-AdvancedPermissionsAndAccounts/04_Cross-AccountPermissions/01_DEMOSETUP/prod_bucketsandrole.yaml
index 49524e3..86479b9 100644
--- a/03-AdvancedPermissionsAndAccounts/04_Cross-AccountPermissions/01_DEMOSETUP/prod_bucketsandrole.yaml
+++ b/03-AdvancedPermissionsAndAccounts/04_Cross-AccountPermissions/01_DEMOSETUP/prod_bucketsandrole.yaml
@@ -9,6 +9,10 @@ Parameters:
 Resources:
   petpics1:
     Type:  AWS::S3::Bucket
+    Properties:
+      OwnershipControls:
+        Rules:
+          - ObjectOwnership: ObjectWriter
   petpics2:
     Type:  AWS::S3::Bucket
   petpics3: