diff --git a/bin/now-deploy b/bin/now-deploy
index 22174ff..483fa06 100755
--- a/bin/now-deploy
+++ b/bin/now-deploy
@@ -14,7 +14,7 @@ import ms from 'ms';
 import { handleError, error } from '../lib/error';
 
 const argv = minimist(process.argv.slice(2), {
-  boolean: ['help', 'version', 'debug', 'force', 'login', 'no-clipboard'],
+  boolean: ['help', 'version', 'debug', 'force', 'login', 'no-clipboard', 'forward-npm'],
   alias: {
     help: 'h',
     debug: 'd',
@@ -22,7 +22,8 @@ const argv = minimist(process.argv.slice(2), {
     force: 'f',
     forceSync: 'F',
     login: 'L',
-    'no-clipboard': 'C'
+    'no-clipboard': 'C',
+    'forward-npm': 'N'
   }
 });
 
@@ -47,6 +48,7 @@ const help = () => {
     -f, --force         force a new deployment even if nothing has changed
     -L, --login         configure login
     -C, --no-clipboard  do not attempt to copy URL to clipboard
+    -N, --forward-npm   Forward login information to install private NPM modules
 
   ${chalk.dim('Examples:')}
 
@@ -93,6 +95,7 @@ const exit = (code) => {
 // options
 const debug = argv.debug;
 const clipboard = !argv['no-clipboard'];
+const forwardNpm = argv['forward-npm'];
 const force = argv.force;
 const forceSync = argv.forceSync;
 const shouldLogin = argv.login;
@@ -138,7 +141,7 @@ async function sync (token) {
   const now = new Now(apiUrl, token, { debug });
 
   try {
-    await now.create(path, { forceNew: force, forceSync: forceSync });
+    await now.create(path, { forceNew: force, forceSync: forceSync, forwardNpm });
   } catch (err) {
     handleError(err);
     process.exit(1);
diff --git a/lib/index.js b/lib/index.js
index e0acd72..571fcbd 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -7,6 +7,8 @@ import retry from 'async-retry';
 import Agent from './agent';
 import EventEmitter from 'events';
 import { basename, resolve as resolvePath } from 'path';
+import { homedir } from 'os';
+import { parse as parseIni } from 'ini';
 import { stat, readFile } from 'fs-promise';
 import resumer from 'resumer';
 import splitArray from 'split-array';
@@ -28,7 +30,7 @@ export default class Now extends EventEmitter {
     this._onRetry = this._onRetry.bind(this);
   }
 
-  async create (path, { forceNew, forceSync }) {
+  async create (path, { forceNew, forceSync, forwardNpm }) {
     this._path = path;
 
     try {
@@ -61,6 +63,33 @@ export default class Now extends EventEmitter {
       throw e;
     }
 
+    const nowProperties = pkg.now || {};
+
+    forwardNpm = forwardNpm || nowProperties['forward-npm'];
+
+    // Read .npmrc
+    let npmrc = {};
+    let authToken;
+    if (forwardNpm) {
+      try {
+        npmrc = await readFile(resolvePath(path, '.npmrc'), 'utf8');
+        npmrc = parseIni(npmrc);
+        authToken = npmrc['//registry.npmjs.org/:_authToken'];
+      } catch (err) {
+        // Do nothing
+      }
+
+      if (!authToken) {
+        try {
+          npmrc = await readFile(resolvePath(homedir(), '.npmrc'), 'utf8');
+          npmrc = parseIni(npmrc);
+          authToken = npmrc['//registry.npmjs.org/:_authToken'];
+        } catch (err) {
+          // Do nothing
+        }
+      }
+    }
+
     if (this._debug) console.time('> [debug] Getting files');
     const files = await getFiles(path, pkg, { debug: this._debug });
     if (this._debug) console.timeEnd('> [debug] Getting files');
@@ -71,7 +100,6 @@ export default class Now extends EventEmitter {
 
     this._files = hashes;
 
-    const nowProperties = pkg.now || {};
     const engines = nowProperties.engines || pkg.engines;
 
     const deployment = await this.retry(async (bail) => {
@@ -83,6 +111,7 @@ export default class Now extends EventEmitter {
           forceSync,
           name: pkg.name || basename(path),
           description: pkg.description,
+          registryAuthToken: authToken,
           // Flatten the array to contain files to sync where each nested input
           // array has a group of files with the same sha but different path
           files: Array.prototype.concat.apply([], Array.from(this._files).map(([sha, { data, names }]) => {
diff --git a/package.json b/package.json
index 5f64116..56895c5 100644
--- a/package.json
+++ b/package.json
@@ -62,6 +62,7 @@
     "email-validator": "1.0.4",
     "fs-promise": "0.5.0",
     "graceful-fs": "4.1.4",
+    "ini": "1.3.4",
     "minimatch": "3.0.0",
     "minimist": "1.2.0",
     "ms": "0.7.1",