diff --git a/src/types.ts b/src/types.ts
index 55ae7d7..5ab3728 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -49,6 +49,10 @@ export type Message = {
   timestamp_ms: number;
   attempts: number;
   lease_id: string;
+  metadata: {
+    "CF-sourceMessageSource": string;
+    "CF-Content-Type": "json" | "text";
+  };
 };
 
 export type CloudFlareError = {