diff --git a/README.md b/README.md
index 1ea5023f..0b116411 100644
--- a/README.md
+++ b/README.md
@@ -57,8 +57,16 @@ Where `[platform]` is `darwin`, `linux`, `win32`, or `all` (default).
 
 The following optional arguments are available:
 
-- `--package=[type]` - Package only one output file. `type` is `deb`, `dmg`, `zip`, or `all` (default)
 - `--sign` - Sign the application (OS X, Windows)
+- `--package=[type]` - Package single output type.
+   - `deb` - Debian package
+   - `zip` - Linux zip file
+   - `dmg` - OS X disk image
+   - `exe` - Windows installer
+   - `portable` - Windows portable app
+   - `all` - All platforms (default)
+
+Note: Even with the `--package` option, the auto-update files (.nupkg for Windows, *-darwin.zip for OS X) will always be produced.
 
 #### Windows build notes
 
diff --git a/bin/package.js b/bin/package.js
index d45cd957..03578f90 100755
--- a/bin/package.js
+++ b/bin/package.js
@@ -8,8 +8,11 @@ var cp = require('child_process')
 var electronPackager = require('electron-packager')
 var fs = require('fs')
 var minimist = require('minimist')
+var mkdirp = require('mkdirp')
 var path = require('path')
 var rimraf = require('rimraf')
+var series = require('run-series')
+var zip = require('cross-zip')
 
 var config = require('../config')
 var pkg = require('../package.json')
@@ -25,6 +28,8 @@ var CERT_PATH = process.platform === 'win32'
   ? 'D:'
   : '/Volumes/Certs'
 
+var DIST_PATH = path.join(config.ROOT_PATH, 'dist')
+
 var argv = minimist(process.argv.slice(2), {
   boolean: [
     'sign'
@@ -39,7 +44,7 @@ var argv = minimist(process.argv.slice(2), {
 })
 
 function build () {
-  rimraf.sync(path.join(config.ROOT_PATH, 'dist'))
+  rimraf.sync(DIST_PATH)
   var platform = argv._[0]
   if (platform === 'darwin') {
     buildDarwin(printDone)
@@ -48,10 +53,10 @@ function build () {
   } else if (platform === 'linux') {
     buildLinux(printDone)
   } else {
-    buildDarwin(function (err, buildPath) {
-      printDone(err, buildPath)
-      buildWin32(function (err, buildPath) {
-        printDone(err, buildPath)
+    buildDarwin(function (err) {
+      printDone(err)
+      buildWin32(function (err) {
+        printDone(err)
         buildLinux(printDone)
       })
     })
@@ -94,7 +99,7 @@ var all = {
   name: config.APP_NAME,
 
   // The base directory where the finished package(s) are created.
-  out: path.join(config.ROOT_PATH, 'dist'),
+  out: DIST_PATH,
 
   // Replace an already existing output directory.
   overwrite: true,
@@ -163,16 +168,6 @@ var linux = {
   // Note: Application icon for Linux is specified via the BrowserWindow `icon` option.
 }
 
-/*
- * Print a large warning when signing is disabled so we are less likely to accidentally
- * ship unsigned binaries to users.
- */
-process.on('exit', function () {
-  if (!argv.sign) {
-    printWarning()
-  }
-})
-
 build()
 
 function buildDarwin (cb) {
@@ -181,7 +176,7 @@ function buildDarwin (cb) {
   console.log('OS X: Packaging electron...')
   electronPackager(Object.assign({}, all, darwin), function (err, buildPath) {
     if (err) return cb(err)
-    console.log('OS X: Packaged electron.')
+    console.log('OS X: Packaged electron. ' + buildPath[0])
 
     var appPath = path.join(buildPath[0], config.APP_NAME + '.app')
     var contentsPath = path.join(appPath, 'Contents')
@@ -227,11 +222,11 @@ function buildDarwin (cb) {
       if (argv.sign) {
         signApp(function (err) {
           if (err) return cb(err)
-          pack()
+          pack(cb)
         })
       } else {
         printWarning()
-        pack()
+        pack(cb)
       }
     } else {
       printWarning()
@@ -267,27 +262,31 @@ function buildDarwin (cb) {
       })
     }
 
-    function pack () {
-      if (argv.package === 'zip' || argv.package === 'all') {
-        packageZip()
-      }
+    function pack (cb) {
+      packageZip() // always produce .zip file, used for automatic updates
+
       if (argv.package === 'dmg' || argv.package === 'all') {
-        packageDmg()
+        packageDmg(cb)
       }
     }
 
     function packageZip () {
       // Create .zip file (used by the auto-updater)
-      var zipPath = path.join(config.ROOT_PATH, 'dist', BUILD_NAME + '-darwin.zip')
       console.log('OS X: Creating zip...')
-      cp.execSync(`cd ${buildPath[0]} && zip -r -y ${zipPath} ${config.APP_NAME + '.app'}`)
+
+      var inPath = path.join(buildPath[0], config.APP_NAME + '.app')
+      var outPath = path.join(DIST_PATH, BUILD_NAME + '-darwin.zip')
+      zip(inPath, outPath)
+
       console.log('OS X: Created zip.')
     }
 
-    function packageDmg () {
+    function packageDmg (cb) {
+      console.log('OS X: Creating dmg...')
+
       var appDmg = require('appdmg')
 
-      var targetPath = path.join(config.ROOT_PATH, 'dist', BUILD_NAME + '.dmg')
+      var targetPath = path.join(DIST_PATH, BUILD_NAME + '.dmg')
       rimraf.sync(targetPath)
 
       // Create a .dmg (OS X disk image) file, for easy user installation.
@@ -312,7 +311,6 @@ function buildDarwin (cb) {
         }
       }
 
-      console.log('OS X: Creating dmg...')
       var dmg = appDmg(dmgOpts)
       dmg.on('error', cb)
       dmg.on('progress', function (info) {
@@ -320,7 +318,7 @@ function buildDarwin (cb) {
       })
       dmg.on('finish', function (info) {
         console.log('OS X: Created dmg.')
-        cb(null, buildPath)
+        cb(null)
       })
     }
   })
@@ -332,7 +330,7 @@ function buildWin32 (cb) {
   console.log('Windows: Packaging electron...')
   electronPackager(Object.assign({}, all, win32), function (err, buildPath) {
     if (err) return cb(err)
-    console.log('Windows: Packaged electron.')
+    console.log('Windows: Packaged electron. ' + buildPath[0])
 
     var signWithParams
     if (process.platform === 'win32') {
@@ -348,65 +346,90 @@ function buildWin32 (cb) {
       printWarning()
     }
 
-    console.log('Windows: Creating installer...')
-    installer.createWindowsInstaller({
-      appDirectory: buildPath[0],
-      authors: config.APP_TEAM,
-      description: config.APP_NAME,
-      exe: config.APP_NAME + '.exe',
-      iconUrl: config.GITHUB_URL_RAW + '/static/' + config.APP_NAME + '.ico',
-      loadingGif: path.join(config.STATIC_PATH, 'loading.gif'),
-      name: config.APP_NAME,
-      noMsi: true,
-      outputDirectory: path.join(config.ROOT_PATH, 'dist'),
-      productName: config.APP_NAME,
-      remoteReleases: config.GITHUB_URL,
-      setupExe: config.APP_NAME + 'Setup-v' + config.APP_VERSION + '.exe',
-      setupIcon: config.APP_ICON + '.ico',
-      signWithParams: signWithParams,
-      title: config.APP_NAME,
-      usePackageJson: false,
-      version: pkg.version
-    }).then(function () {
-      console.log('Windows: Created installer.')
-      cb(null, buildPath)
-    }).catch(cb)
+    var tasks = []
+    if (argv.package === 'exe' || argv.package === 'all') {
+      tasks.push((cb) => packageInstaller(cb))
+    }
+    if (argv.package === 'portable' || argv.package === 'all') {
+      tasks.push((cb) => packagePortable(cb))
+    }
+    series(tasks, cb)
+
+    function packageInstaller (cb) {
+      console.log('Windows: Creating installer...')
+      installer.createWindowsInstaller({
+        appDirectory: buildPath[0],
+        authors: config.APP_TEAM,
+        description: config.APP_NAME,
+        exe: config.APP_NAME + '.exe',
+        iconUrl: config.GITHUB_URL_RAW + '/static/' + config.APP_NAME + '.ico',
+        loadingGif: path.join(config.STATIC_PATH, 'loading.gif'),
+        name: config.APP_NAME,
+        noMsi: true,
+        outputDirectory: DIST_PATH,
+        productName: config.APP_NAME,
+        remoteReleases: config.GITHUB_URL,
+        setupExe: config.APP_NAME + 'Setup-v' + config.APP_VERSION + '.exe',
+        setupIcon: config.APP_ICON + '.ico',
+        signWithParams: signWithParams,
+        title: config.APP_NAME,
+        usePackageJson: false,
+        version: pkg.version
+      }).then(function () {
+        console.log('Windows: Created installer.')
+        cb(null)
+      }).catch(cb)
+    }
+
+    function packagePortable (cb) {
+      // Create Windows portable app
+      console.log('Windows: Creating portable app...')
+
+      var portablePath = path.join(buildPath[0], 'Portable Settings')
+      mkdirp.sync(portablePath)
+
+      var inPath = path.join(DIST_PATH, path.basename(buildPath[0]))
+      var outPath = path.join(DIST_PATH, BUILD_NAME + '-win.zip')
+      zip(inPath, outPath)
+
+      console.log('Windows: Created portable app.')
+      cb(null)
+    }
   })
 }
 
 function buildLinux (cb) {
-  var distPath = path.join(config.ROOT_PATH, 'dist')
-
   console.log('Linux: Packaging electron...')
   electronPackager(Object.assign({}, all, linux), function (err, buildPath) {
     if (err) return cb(err)
-    console.log('Linux: Packaged electron.')
+    console.log('Linux: Packaged electron. ' + buildPath[0])
 
-    for (var i = 0; i < buildPath.length; i++) {
-      var filesPath = buildPath[i]
+    var tasks = []
+    buildPath.forEach(function (filesPath) {
       var destArch = filesPath.split('-').pop()
 
       if (argv.package === 'deb' || argv.package === 'all') {
-        packageDeb(filesPath, destArch)
+        tasks.push((cb) => packageDeb(filesPath, destArch, cb))
       }
-
       if (argv.package === 'zip' || argv.package === 'all') {
-        packageZip(filesPath, destArch)
+        tasks.push((cb) => packageZip(filesPath, destArch, cb))
       }
-    }
+    })
+    series(tasks, cb)
   })
 
-  function packageDeb (filesPath, destArch) {
+  function packageDeb (filesPath, destArch, cb) {
     // Create .deb file for Debian-based platforms
+    console.log(`Linux: Creating ${destArch} deb...`)
+
     var deb = require('nobin-debian-installer')()
     var destPath = path.join('/opt', pkg.name)
 
-    console.log(`Linux: Creating ${destArch} deb...`)
     deb.pack({
       package: pkg,
       info: {
         arch: destArch === 'x64' ? 'amd64' : 'i386',
-        targetDir: distPath,
+        targetDir: DIST_PATH,
         depends: 'libc6 (>= 2.4)',
         scripts: {
           postinst: path.join(config.STATIC_PATH, 'linux', 'postinst'),
@@ -419,26 +442,33 @@ function buildLinux (cb) {
       expand: true,
       cwd: filesPath
     }], function (err) {
-      if (err) return console.error(err.message || err)
+      if (err) return cb(err)
       console.log(`Linux: Created ${destArch} deb.`)
+      cb(null)
     })
   }
 
-  function packageZip (filesPath, destArch) {
+  function packageZip (filesPath, destArch, cb) {
     // Create .zip file for Linux
-    var zipPath = path.join(config.ROOT_PATH, 'dist', BUILD_NAME + '-linux-' + destArch + '.zip')
-    var appFolderName = path.basename(filesPath)
     console.log(`Linux: Creating ${destArch} zip...`)
-    cp.execSync(`cd ${distPath} && zip -r -y ${zipPath} ${appFolderName}`)
+
+    var inPath = path.join(DIST_PATH, path.basename(filesPath))
+    var outPath = path.join(DIST_PATH, BUILD_NAME + '-linux-' + destArch + '.zip')
+    zip(inPath, outPath)
+
     console.log(`Linux: Created ${destArch} zip.`)
+    cb(null)
   }
 }
 
-function printDone (err, buildPath) {
+function printDone (err) {
   if (err) console.error(err.message || err)
-  else console.log('Built ' + buildPath[0])
 }
 
+/*
+ * Print a large warning when signing is disabled so we are less likely to accidentally
+ * ship unsigned binaries to users.
+ */
 function printWarning () {
   console.log(fs.readFileSync(path.join(__dirname, 'warning.txt'), 'utf8'))
 }
diff --git a/bin/release-_pre.sh b/bin/release-_pre.sh
index 1eb3981b..78e88c71 100755
--- a/bin/release-_pre.sh
+++ b/bin/release-_pre.sh
@@ -6,4 +6,6 @@ npm run update-authors
 git diff --exit-code
 rm -rf node_modules/
 npm install
+npm prune
+npm dedupe
 npm test
diff --git a/config.js b/config.js
index 7cecb1fe..8ec82a1d 100644
--- a/config.js
+++ b/config.js
@@ -1,10 +1,13 @@
-var applicationConfigPath = require('application-config-path')
+var appConfig = require('application-config')('WebTorrent')
 var path = require('path')
+var pathExists = require('path-exists')
 
 var APP_NAME = 'WebTorrent'
 var APP_TEAM = 'The WebTorrent Project'
 var APP_VERSION = require('./package.json').version
 
+var PORTABLE_PATH = path.join(path.dirname(process.execPath), 'Portable Settings')
+
 module.exports = {
   APP_COPYRIGHT: 'Copyright © 2014-2016 ' + APP_TEAM,
   APP_FILE_ICON: path.join(__dirname, 'static', 'WebTorrentFile'),
@@ -14,19 +17,20 @@ module.exports = {
   APP_VERSION: APP_VERSION,
   APP_WINDOW_TITLE: APP_NAME + ' (BETA)',
 
+  AUTO_UPDATE_CHECK_STARTUP_DELAY: 5 * 1000 /* 5 seconds */,
   AUTO_UPDATE_URL: 'https://webtorrent.io/desktop/update' +
     '?version=' + APP_VERSION + '&platform=' + process.platform,
-  AUTO_UPDATE_CHECK_STARTUP_DELAY: 5 * 1000 /* 5 seconds */,
 
   CRASH_REPORT_URL: 'https://webtorrent.io/desktop/crash-report',
 
-  CONFIG_PATH: applicationConfigPath(APP_NAME),
-  CONFIG_POSTER_PATH: path.join(applicationConfigPath(APP_NAME), 'Posters'),
-  CONFIG_TORRENT_PATH: path.join(applicationConfigPath(APP_NAME), 'Torrents'),
+  CONFIG_PATH: getConfigPath(),
+  CONFIG_POSTER_PATH: path.join(getConfigPath(), 'Posters'),
+  CONFIG_TORRENT_PATH: path.join(getConfigPath(), 'Torrents'),
 
   GITHUB_URL: 'https://github.com/feross/webtorrent-desktop',
   GITHUB_URL_RAW: 'https://raw.githubusercontent.com/feross/webtorrent-desktop/master',
 
+  IS_PORTABLE: isPortable(),
   IS_PRODUCTION: isProduction(),
 
   ROOT_PATH: __dirname,
@@ -40,6 +44,18 @@ module.exports = {
   WINDOW_MIN_WIDTH: 425
 }
 
+function getConfigPath () {
+  if (isPortable()) {
+    return PORTABLE_PATH
+  } else {
+    return path.dirname(appConfig.filePath)
+  }
+}
+
+function isPortable () {
+  return process.platform === 'win32' && isProduction() && pathExists(PORTABLE_PATH)
+}
+
 function isProduction () {
   if (!process.versions.electron) {
     return false
diff --git a/main/index.js b/main/index.js
index 2ad0c939..3d36c66f 100644
--- a/main/index.js
+++ b/main/index.js
@@ -37,6 +37,10 @@ if (!shouldQuit) {
 }
 
 function init () {
+  if (config.IS_PORTABLE) {
+    app.setPath('userData', config.CONFIG_PATH)
+  }
+
   app.ipcReady = false // main window has finished loading and IPC is ready
   app.isQuitting = false
 
diff --git a/package.json b/package.json
index da1e9c64..295175a1 100644
--- a/package.json
+++ b/package.json
@@ -15,8 +15,7 @@
   },
   "dependencies": {
     "airplay-js": "guerrerocarlos/node-airplay-js",
-    "application-config": "^0.2.0",
-    "application-config-path": "^0.1.0",
+    "application-config": "feross/node-application-config",
     "bitfield": "^1.0.2",
     "chromecasts": "^1.8.0",
     "concat-stream": "^1.5.1",
@@ -43,6 +42,7 @@
     "winreg": "^1.1.1"
   },
   "devDependencies": {
+    "cross-zip": "^1.0.0",
     "electron-osx-sign": "^0.3.0",
     "electron-packager": "^6.0.2",
     "electron-winstaller": "feross/windows-installer#build",
@@ -50,6 +50,7 @@
     "minimist": "^1.2.0",
     "nobin-debian-installer": "^0.0.9",
     "plist": "^1.2.0",
+    "run-series": "^1.1.4",
     "standard": "^6.0.5"
   },
   "homepage": "https://webtorrent.io",
@@ -71,7 +72,7 @@
   },
   "scripts": {
     "clean": "node ./bin/clean.js",
-    "package": "npm install && npm prune && npm dedupe && node ./bin/package.js",
+    "package": "node ./bin/package.js",
     "start": "electron .",
     "test": "standard",
     "update-authors": "./bin/update-authors.sh"
diff --git a/renderer/index.js b/renderer/index.js
index a64d2e18..b607fbb6 100644
--- a/renderer/index.js
+++ b/renderer/index.js
@@ -1,6 +1,6 @@
 console.time('init')
 
-var cfg = require('application-config')('WebTorrent')
+var appConfig = require('application-config')('WebTorrent')
 var concat = require('concat-stream')
 var dragDrop = require('drag-drop')
 var electron = require('electron')
@@ -26,6 +26,8 @@ var util = require('./util')
 var {setDispatch} = require('./lib/dispatcher')
 setDispatch(dispatch)
 
+appConfig.filePath = config.CONFIG_PATH + path.sep + 'config.json'
+
 // Electron apps have two processes: a main process (node) runs first and starts
 // a renderer process (essentially a Chrome window). We're in the renderer process,
 // and this IPC channel receives from and sends messages to the main process
@@ -425,9 +427,9 @@ function setupIpc () {
 
 // Load state.saved from the JSON state file
 function loadState (cb) {
-  cfg.read(function (err, data) {
+  appConfig.read(function (err, data) {
     if (err) console.error(err)
-    console.log('loaded state from ' + cfg.filePath)
+    console.log('loaded state from ' + appConfig.filePath)
 
     // populate defaults if they're not there
     state.saved = Object.assign({}, State.getDefaultSavedState(), data)
@@ -457,7 +459,7 @@ function saveStateThrottled () {
 
 // Write state.saved to the JSON state file
 function saveState () {
-  console.log('saving state to ' + cfg.filePath)
+  console.log('saving state to ' + appConfig.filePath)
 
   // Clean up, so that we're not saving any pending state
   var copy = Object.assign({}, state.saved)
@@ -479,7 +481,7 @@ function saveState () {
       return torrent
     })
 
-  cfg.write(copy, function (err) {
+  appConfig.write(copy, function (err) {
     if (err) console.error(err)
     ipcRenderer.send('savedState')
   })
diff --git a/renderer/state.js b/renderer/state.js
index f57c4910..010d091c 100644
--- a/renderer/state.js
+++ b/renderer/state.js
@@ -1,4 +1,5 @@
 var electron = require('electron')
+var path = require('path')
 
 var remote = electron.remote
 
@@ -255,6 +256,8 @@ function getDefaultSavedState () {
         ]
       }
     ],
-    downloadPath: remote.app.getPath('downloads')
+    downloadPath: config.IS_PORTABLE
+      ? path.join(config.CONFIG_PATH, 'Downloads')
+      : remote.app.getPath('downloads')
   }
 }