diff --git a/setup_demo.yml b/setup_demo.yml
index d840864..a2212fb 100644
--- a/setup_demo.yml
+++ b/setup_demo.yml
@@ -17,6 +17,7 @@
             notification_configuration:
               url: https://script.google.com/macros/s/AKfycbxSjCQ36cMWfWxG0dAjkL-gz-heiBcfLXFOOd0FV34JKXnagsCoAbOIa3q3Yr0YG91mHQ/exec
               http_method: POST
+              headers: {}
 
     - name: "include configuration for {{ demo }}"
       include_vars: "{{demo}}/setup.yml"