diff --git a/README.md b/README.md
index 8c3a69bb..4f5358f0 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ source.onmessage = (event) => {
       id: webhookEvent["x-request-id"],
       name: webhookEvent["x-github-event"],
       signature: webhookEvent["x-hub-signature"],
-      payload: webhookEvent.body,
+      payload: JSON.stringify(webhookEvent.body),
     })
     .catch(console.error);
 };