cookie: false

package.json

 {
   "name": "rpclibrary",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "rpclibrary is a websocket RPC library",
   "main": "./js/Index.js",
   "repository": {

src/PromiseIO/Server.ts

 import { Server as httpServer } from "http"
 import * as U from '../Utils'
 import * as T from '../Types'
-const socketio = require('socket.io')
+import socketio = require('socket.io')
 
 export class PromiseIO {
     io?: Server
 
     attach(httpServer: httpServer) {
         this.httpServer = httpServer
-        this.io = socketio(httpServer)
+        this.io = socketio(httpServer, { cookie:false })
         this.io!.on('connection', (sock: Socket) => {
             const pioSock = U.makePioSocket(sock)
             this.listeners['socket'].forEach(listener => listener(pioSock))
     }
 
     listen(port: number) {
-        this.io!.listen(port, {
-            cookie: false
-        })
+        this.httpServer!.listen(port)
     }
 
     on(eventName: string, listener: T.AnyFunction) {