diff --git a/twilio/twilio-tests.ts b/twilio/twilio-tests.ts
index 30e9892078..d7f2c60993 100644
--- a/twilio/twilio-tests.ts
+++ b/twilio/twilio-tests.ts
@@ -228,5 +228,5 @@ twilio.validateRequest(token, str, 'http://example.herokuapp.com', { query: 'val
 twilio.validateExpressRequest({}, 'YOUR_TWILIO_AUTH_TOKEN');
 twilio.validateExpressRequest({}, 'YOUR_TWILIO_AUTH_TOKEN', {});
 twilio.webhook({ validate: false });
-
+twilio.webhook("MYAUTHTOKEN", { validate: false });
 
diff --git a/twilio/twilio.d.ts b/twilio/twilio.d.ts
index d6af461760..8bd6911113 100644
--- a/twilio/twilio.d.ts
+++ b/twilio/twilio.d.ts
@@ -446,7 +446,8 @@ declare namespace twilio {
   // For interop with node middleware chains
   export interface MiddlewareFunction { (request: Http.ClientRequest, response: Http.ClientResponse, next: MiddlewareFunction): void; }
 
-  export function webhook(options?: string | webhookOptions): MiddlewareFunction;
+  export function webhook(authToken: string, options?: webhookOptions): MiddlewareFunction;
+  export function webhook(options?: webhookOptions): MiddlewareFunction;
 
   export function validateRequest(authToken: string, twilioHeader: string, url: string, params?: any): boolean;
   export function validateExpressRequest(request: express.Request, authToken: string, options?: WebhookExpressOptions): boolean;