diff --git a/app/models/webhook/delivery.rb b/app/models/webhook/delivery.rb
index 9c6ee975e..f53d1f8cf 100644
--- a/app/models/webhook/delivery.rb
+++ b/app/models/webhook/delivery.rb
@@ -97,7 +97,7 @@ class Webhook::Delivery < ApplicationRecord
         "User-Agent" => USER_AGENT,
         "Content-Type" => "application/json",
         "X-Webhook-Signature" => signature,
-        "X-Webhook-Timestamp" => Time.current.utc.iso8601
+        "X-Webhook-Timestamp" => event.created_at.utc.iso8601
       }
     end