diff --git a/src/core/pusher.ts b/src/core/pusher.ts
index 634c15c6c..24d447e6e 100644
--- a/src/core/pusher.ts
+++ b/src/core/pusher.ts
@@ -59,7 +59,7 @@ export default class Pusher {
   connection: ConnectionManager;
   timelineSenderTimer: PeriodicTimer;
 
-  constructor(app_key: string, options: Options) {
+  constructor(app_key: string, options?: Options) {
     checkAppKey(app_key);
     options = options || {};
     if (!options.cluster && !(options.wsHost || options.httpHost)) {
diff --git a/types/src/core/options.d.ts b/types/src/core/options.d.ts
index ed79af525..509d2bac1 100644
--- a/types/src/core/options.d.ts
+++ b/types/src/core/options.d.ts
@@ -2,6 +2,7 @@ import { AuthOptions, AuthorizerGenerator } from './auth/options';
 export interface PusherOptions {
     cluster: string;
     disableStats: boolean;
+    enableStats: boolean;
     statsHost: string;
     activity_timeout: number;
     pong_timeout: number;
@@ -17,6 +18,7 @@ declare type Transport = 'ws' | 'wss' | 'xhr_streaming' | 'xhr_polling' | 'sockj
 declare type AuthTransport = 'ajax' | 'jsonp';
 export interface Options {
     activityTimeout?: number;
+    enableStats?: boolean;
     disableStats?: boolean;
     authEndpoint?: string;
     auth?: AuthOptions;
diff --git a/types/src/core/pusher.d.ts b/types/src/core/pusher.d.ts
index 2e03c4475..95ae1da97 100644
--- a/types/src/core/pusher.d.ts
+++ b/types/src/core/pusher.d.ts
@@ -27,7 +27,7 @@ export default class Pusher {
     timelineSender: TimelineSender;
     connection: ConnectionManager;
     timelineSenderTimer: PeriodicTimer;
-    constructor(app_key: string, options: Options);
+    constructor(app_key: string, options?: Options);
     channel(name: string): Channel;
     allChannels(): Channel[];
     connect(): void;