diff --git a/README.md b/README.md
index f7302b71..400c9e77 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
       src="https://cdn.rawgit.com/webpack/media/e7485eb2/logo/icon.svg">
   </a>
   <h1>UglifyJS Webpack Plugin</h1>
-	<p>This plugin uses <a href="https://github.com/mishoo/UglifyJS2/tree/v2.x">UglifyJS v2</a> to minify your JavaScript.<p>
+	<p>This plugin uses <a href="https://github.com/mishoo/UglifyJS2/tree/harmony">UglifyES v3</a> to minify your JavaScript.<p>
 </div>
 
 > Note that webpack contains the same plugin under `webpack.optimize.UglifyJsPlugin`. This is a standalone version for those that want to control the version of UglifyJS. The documentation is valid apart from the installation instructions in that case.
@@ -31,20 +31,6 @@ With npm:
 npm install uglifyjs-webpack-plugin --save-dev
 ```
 
-**Important!** The plugin has a peer dependency to uglify-js, so in order to use the plugin, also uglify-js has to be installed. The currently (2017/1/25) available uglify-js npm packages; however, do not support minification of ES6 code. In order to support ES6, an ES6-capable, a.k.a. _harmony_, version of UglifyJS has to be provided.
-
-If your minification target is ES6:
-
-```bash
-yarn add git://github.com/mishoo/UglifyJS2#harmony-v2.8.22 --dev
-```
-
-If your minification target is ES5:
-
-```bash
-yarn add uglify-js --dev
-```
-
 <h2 align="center">Usage</h2>
 
 ```javascript
diff --git a/package.json b/package.json
index d3d72e78..f5ca588d 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
   },
   "dependencies": {
     "source-map": "^0.5.6",
-    "uglify-js": "^2.8.29",
+    "uglify-es": "^3.0.19",
     "webpack-sources": "^1.0.1"
   },
   "devDependencies": {
diff --git a/src/index.js b/src/index.js
index 30ede3f5..f3bf6c9e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -10,7 +10,7 @@ const RawSource = require("webpack-sources").RawSource;
 const ConcatSource = require("webpack-sources").ConcatSource;
 const RequestShortener = require("webpack/lib/RequestShortener");
 const ModuleFilenameHelpers = require("webpack/lib/ModuleFilenameHelpers");
-const uglify = require("uglify-js");
+const uglify = require("uglify-es");
 
 class UglifyJsPlugin {
 	constructor(options) {
diff --git a/yarn.lock b/yarn.lock
index c000207e..b2b63247 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -950,7 +950,7 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^2.8.1:
+commander@^2.8.1, commander@~2.9.0:
   version "2.9.0"
   resolved "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
   dependencies:
@@ -3655,7 +3655,14 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-uglify-js@^2.6, uglify-js@^2.8.27, uglify-js@^2.8.29:
+uglify-es@^3.0.19:
+  version "3.0.19"
+  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.0.19.tgz#53d448ddf59770c1eafbe2e257a27e2f4851d0e5"
+  dependencies:
+    commander "~2.9.0"
+    source-map "~0.5.1"
+
+uglify-js@^2.6, uglify-js@^2.8.27:
   version "2.8.29"
   resolved "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz#29c5733148057bb4e1f75df35b7a9cb72e6a59dd"
   dependencies: