diff --git a/.editorconfig b/.editorconfig
index 8f9d77e..1c6314a 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -7,9 +7,6 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[{package.json,*.yml}]
+[*.yml]
 indent_style = space
 indent_size = 2
-
-[*.md]
-trim_trailing_whitespace = false
diff --git a/.gitattributes b/.gitattributes
index 176a458..391f0a4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,2 @@
 * text=auto
+*.js text eol=lf
diff --git a/.travis.yml b/.travis.yml
index 9134a0c..b18bae5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 sudo: false
 language: node_js
 node_js:
-  - '0.12'
+  - '6'
+  - '4'
diff --git a/Brocfile.js b/Brocfile.js
deleted file mode 100644
index e4685c0..0000000
--- a/Brocfile.js
+++ /dev/null
@@ -1,2 +0,0 @@
-'use strict';
-module.exports = require('./')('fixture', {sourcemap: true, cascade: false});
diff --git a/brocfile.js b/brocfile.js
new file mode 100644
index 0000000..0030123
--- /dev/null
+++ b/brocfile.js
@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('.')('fixture', {sourcemap: true, cascade: false});
diff --git a/index.js b/index.js
index 608ae83..0371e92 100644
--- a/index.js
+++ b/index.js
@@ -1,11 +1,11 @@
 'use strict';
-var Filter = require('broccoli-persistent-filter');
-var objectAssign = require('object-assign');
-var postcss = require('postcss');
-var autoprefixer = require('autoprefixer');
+const Filter = require('broccoli-persistent-filter');
+const postcss = require('postcss');
+const autoprefixer = require('autoprefixer');
 
 function AutoprefixerFilter(inputTree, _options) {
-	var options = _options || {};
+	const options = _options || {};
+
 	if (!(this instanceof AutoprefixerFilter)) {
 		return new AutoprefixerFilter(inputTree, _options);
 	}
@@ -23,20 +23,20 @@ AutoprefixerFilter.prototype.extensions = ['css'];
 AutoprefixerFilter.prototype.targetExtension = 'css';
 
 AutoprefixerFilter.prototype.processString = function (str, relativePath) {
-	var opts = objectAssign({
+	const opts = Object.assign({
 		from: relativePath,
 		to: relativePath
 	}, this.options);
 
-	// support explicit override of inline sourcemaps
+	// Support explicit override of inline sourcemaps
 	if (opts.sourcemap !== null || opts.sourcemap !== undefined) {
 		opts.map = opts.sourcemap ? 'inline' : false;
 	}
 
 	return postcss(autoprefixer(opts))
 		.process(str, opts)
-		.then(function (result) {
-			var warnings = result.warnings();
+		.then(result => {
+			const warnings = result.warnings();
 
 			if (warnings.length > 0) {
 				console.error(warnings.join('\n'));
@@ -44,9 +44,9 @@ AutoprefixerFilter.prototype.processString = function (str, relativePath) {
 
 			return result.css;
 		})
-		.catch(function (err) {
+		.catch(err => {
 			if (err.name === 'CssSyntaxError') {
-				// TODO: find a way to hide the stack so to adhere to the PostCSS guidelines
+				// TODO: Find a way to hide the stack so to adhere to the PostCSS guidelines
 				err.message += err.showSourceCode();
 			}
 
diff --git a/package.json b/package.json
index b805582..d99db5a 100644
--- a/package.json
+++ b/package.json
@@ -10,10 +10,10 @@
     "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=0.12.0"
+    "node": ">=4"
   },
   "scripts": {
-    "test": "xo && broccoli build temp && mocha"
+    "test": "xo && broccoli build temp && ava"
   },
   "files": [
     "index.js"
@@ -32,14 +32,13 @@
   "dependencies": {
     "autoprefixer": "^7.0.0",
     "broccoli-persistent-filter": "^1.1.6",
-    "object-assign": "^4.0.1",
     "postcss": "^6.0.1"
   },
   "devDependencies": {
+    "ava": "*",
     "broccoli": "^1.1.1",
     "broccoli-cli": "^1.0.0",
-    "mocha": "*",
-    "rimraf": "^2.2.6",
+    "del": "^2.2.2",
     "xo": "*"
   }
 }
diff --git a/readme.md b/readme.md
index 3d79b24..2b541ab 100644
--- a/readme.md
+++ b/readme.md
@@ -15,7 +15,7 @@ $ npm install --save-dev broccoli-autoprefixer
 ## Usage
 
 ```js
-var autoprefixer = require('broccoli-autoprefixer');
+const autoprefixer = require('broccoli-autoprefixer');
 tree = autoprefixer(tree, options);
 ```
 
@@ -26,25 +26,24 @@ tree = autoprefixer(tree, options);
 
 #### options
 
+Type: `Object`
+
 See the Autoprefixer [options](https://github.com/postcss/autoprefixer#options).
 
 In addition, you can set this option:
 
 ##### sourcemap
 
-Type: `boolean`  
+Type: `boolean`<br>
 Default: `true` if the input has a sourcemap, otherwise `false`
 
 Set to `true` to include a base64-encoded sourcemap at the end of the output.
 
-If a sourcemap already exists in the input, Autoprefixer will automatically
-include an updated sourcemap in the output. Set this value to `false` to
-strip out the sourcemap entirely.
+If a sourcemap already exists in the input, Autoprefixer will automatically include an updated sourcemap in the output. Set this value to `false` to strip out the sourcemap entirely.
 
-If you'd like to extract the inline sourcemap from the output, consider using a
-tool like [broccoli-source-map](https://github.com/myfreeweb/broccoli-source-map).
+If you'd like to extract the inline sourcemap from the output, consider using a tool like [`broccoli-source-map`](https://github.com/myfreeweb/broccoli-source-map).
 
 
 ## License
 
-MIT © [Sindre Sorhus](http://sindresorhus.com)
+MIT © [Sindre Sorhus](https://sindresorhus.com)
diff --git a/test.js b/test.js
index 0216675..8fc8ee9 100644
--- a/test.js
+++ b/test.js
@@ -1,15 +1,13 @@
-/* eslint-env mocha */
-'use strict';
-var assert = require('assert');
-var fs = require('fs');
-var rimraf = require('rimraf');
+import fs from 'fs';
+import test from 'ava';
+import del from 'del';
 
-afterEach(function () {
-	rimraf.sync('temp');
+test.afterEach(() => {
+	del.sync('temp');
 });
 
-it('should prefix CSS', function () {
-	var f = fs.readFileSync('temp/fixture.css', 'utf8');
-	assert(/:-webkit-full-screen/.test(f), f);
-	assert(/sourceMappingURL=data:application/.test(f));
+test('prefix CSS', t => {
+	const f = fs.readFileSync('temp/fixture.css', 'utf8');
+	t.regex(f, /:-webkit-full-screen/);
+	t.regex(f, /sourceMappingURL=data:application/);
 });