diff --git a/src/common/providers/https.ts b/src/common/providers/https.ts
index 67c63613f..89c4fa4fd 100644
--- a/src/common/providers/https.ts
+++ b/src/common/providers/https.ts
@@ -32,7 +32,7 @@ import { apps } from '../../apps';
 
 /** @hidden */
 export interface Request extends express.Request {
-  rawBody: Buffer;
+  rawBody?: Buffer;
 }
 
 /**