diff --git a/bin/now-deploy.js b/bin/now-deploy.js
index e5f424c..be76598 100755
--- a/bin/now-deploy.js
+++ b/bin/now-deploy.js
@@ -675,7 +675,7 @@ async function sync(token) {
 
 function printLogs(host, token) {
   // Log build
-  const logger = new Logger(host, { debug, quiet });
+  const logger = new Logger(host, token, { debug, quiet });
 
   logger.on('error', async err => {
     if (!quiet) {
diff --git a/lib/build-logger.js b/lib/build-logger.js
index 879f6ff..7601912 100644
--- a/lib/build-logger.js
+++ b/lib/build-logger.js
@@ -33,9 +33,10 @@ class Lines {
 }
 
 module.exports = class Logger extends EventEmitter {
-  constructor(host, { debug = false, quiet = false } = {}) {
+  constructor(host, token, { debug = false, quiet = false } = {}) {
     super();
     this.host = host;
+    this.token = token;
     this.debug = debug;
     this.quiet = quiet;
 
@@ -44,6 +45,7 @@ module.exports = class Logger extends EventEmitter {
 
     this.socket = io(`https://io.now.sh/states?host=${host}&v=2`);
     this.socket.once('error', this.onSocketError.bind(this));
+    this.socket.on('auth', this.onAuth.bind(this));
     this.socket.on('state', this.onState.bind(this));
     this.socket.on('logs', this.onLog.bind(this));
     this.socket.on('backend', this.onComplete.bind(this));
@@ -54,6 +56,13 @@ module.exports = class Logger extends EventEmitter {
     this.buf = [];
   }
 
+  onAuth(callback) {
+    if (this.debug) {
+      console.log('> [debug] authenticate');
+    }
+    callback(this.token);
+  }
+
   onState(state) {
     // Console.log(state)
     if (!state.id) {