diff --git a/js/package.json b/js/package.json
index af56140b1..f9ef9c181 100644
--- a/js/package.json
+++ b/js/package.json
@@ -43,6 +43,7 @@
     "test": "mocha 'src/**/*.spec.js'",
     "test:coverage": "istanbul cover _mocha -- 'src/**/*.spec.js'",
     "test:e2e": "mocha 'src/**/*.e2e.js'",
+    "test:npm": "(cd .npmjs && npm i) && node test/npmLibrary && (rm -rf .npmjs/node_modules)",
     "prepush": "npm run lint:cached"
   },
   "devDependencies": {
diff --git a/js/parity.package.json b/js/parity.package.json
index 7d18cc5ed..0974e072f 100644
--- a/js/parity.package.json
+++ b/js/parity.package.json
@@ -27,6 +27,7 @@
   },
   "dependencies": {
     "bignumber.js": "^2.3.0",
-    "js-sha3": "^0.5.2"
+    "js-sha3": "^0.5.2",
+    "node-fetch": "^1.6.3"
   }
 }
diff --git a/js/src/library.js b/js/src/library.js
index fbbab2286..2b526c28e 100644
--- a/js/src/library.js
+++ b/js/src/library.js
@@ -14,10 +14,22 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+import 'babel-polyfill/dist/polyfill.js';
+import es6Promise from 'es6-promise';
+es6Promise.polyfill();
+
+const isNode = typeof global !== 'undefined' && typeof global !== 'undefined';
+const isBrowser = typeof self !== 'undefined' && typeof self.window !== 'undefined';
+
+if (isBrowser) {
+  require('whatwg-fetch');
+}
+
+if (isNode) {
+  global.fetch = require('node-fetch');
+}
+
 import Abi from './abi';
 import Api from './api';
 
-export {
-  Abi,
-  Api
-};
+module.exports = { Api, Abi };
diff --git a/js/test/npmLibrary.js b/js/test/npmLibrary.js
new file mode 100644
index 000000000..63d8f9515
--- /dev/null
+++ b/js/test/npmLibrary.js
@@ -0,0 +1,45 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+try {
+  var Api = require('../.npmjs/library.js').Api;
+  var Abi = require('../.npmjs/library.js').Abi;
+
+  if (typeof Api !== 'function') {
+    throw new Error('No Api');
+  }
+
+  if (typeof Abi !== 'function') {
+    throw new Error('No Abi');
+  }
+
+  var transport = new Api.Transport.Http('http://localhost:8545');
+  var api = new Api(transport);
+
+  api.eth
+    .blockNumber()
+    .then((block) => {
+      console.log('library working fine', '(block #' + block.toFormat() + ')');
+      process.exit(0);
+    })
+    .catch(() => {
+      console.log('library working fine (disconnected)');
+      process.exit(0);
+    });
+} catch (e) {
+  console.error('An error occured:', e.toString().split('\n')[0]);
+  process.exit(1);
+}
diff --git a/js/webpack.libraries.js b/js/webpack.libraries.js
index bf54a933f..07e40957e 100644
--- a/js/webpack.libraries.js
+++ b/js/webpack.libraries.js
@@ -26,6 +26,7 @@ const DEST = process.env.BUILD_DEST || '.build';
 
 module.exports = {
   context: path.join(__dirname, './src'),
+  target: 'node',
   entry: {
     // library
     'inject': ['./web3.js'],
@@ -34,9 +35,18 @@ module.exports = {
   },
   output: {
     path: path.join(__dirname, DEST),
-    filename: '[name].js'
+    filename: '[name].js',
+    library: '[name].js',
+    libraryTarget: 'umd'
+  },
+  externals: {
+    'node-fetch': 'node-fetch',
+    'vertx': 'vertx'
   },
   module: {
+    noParse: [
+      /babel-polyfill/
+    ],
     loaders: [
       {
         test: /\.js$/,
diff --git a/js/webpack.npm.js b/js/webpack.npm.js
index 23e2b7939..80b6dd540 100644
--- a/js/webpack.npm.js
+++ b/js/webpack.npm.js
@@ -24,13 +24,23 @@ const isProd = ENV === 'production';
 
 module.exports = {
   context: path.join(__dirname, './src'),
+  target: 'node',
   entry: 'library.js',
   output: {
     path: path.join(__dirname, '.npmjs'),
     filename: 'library.js',
-    libraryTarget: 'commonjs'
+    library: 'Parity',
+    libraryTarget: 'umd',
+    umdNamedDefine: true
+  },
+  externals: {
+    'node-fetch': 'node-fetch',
+    'vertx': 'vertx'
   },
   module: {
+    noParse: [
+      /babel-polyfill/
+    ],
     loaders: [
       {
         test: /(\.jsx|\.js)$/,