diff --git a/websocket/index.d.ts b/websocket/index.d.ts
index 69ec206209..83d127c599 100644
--- a/websocket/index.d.ts
+++ b/websocket/index.d.ts
@@ -9,6 +9,7 @@
 
 import events = require('events');
 import http = require('http');
+import https = require('https');
 import net = require('net');
 import url = require('url');