diff --git a/v1/index.d.ts b/v1/index.d.ts
index 72a1ed0..f355e07 100644
--- a/v1/index.d.ts
+++ b/v1/index.d.ts
@@ -40,7 +40,7 @@ export class Cloudevent {
 export class StructuredHTTPEmitter {
   public constructor(configuration?: any);
 
-  public emit(event: Cloudevent): Promise;
+  public emit(event: Cloudevent): Promise<any>;
 }
 
 /**