diff --git a/.editorconfig b/.editorconfig
index 86c8f59..98a761d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -7,9 +7,6 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[package.json]
+[{package.json,*.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/.jshintrc b/.jshintrc
deleted file mode 100644
index 804f8af..0000000
--- a/.jshintrc
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-	"node": true,
-	"esnext": true,
-	"bitwise": true,
-	"camelcase": true,
-	"curly": true,
-	"immed": true,
-	"newcap": true,
-	"noarg": true,
-	"undef": true,
-	"unused": "vars",
-	"strict": true
-}
diff --git a/.travis.yml b/.travis.yml
index dedfc07..b18bae5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 sudo: false
 language: node_js
 node_js:
-  - 'iojs'
-  - '0.12'
-  - '0.10'
+  - '6'
+  - '4'
diff --git a/gulpfile.js b/gulpfile.js
index d575d89..634cbce 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,7 +1,8 @@
 'use strict';
-var gulp = require('gulp');
-var debug = require('./');
+const gulp = require('gulp');
+const debug = require('./');
 
-gulp.task('default', function () {
-	return gulp.src('*').pipe(debug());
-});
+gulp.task('default', () =>
+	gulp.src('*')
+		.pipe(debug())
+);
diff --git a/index.js b/index.js
index ae0b6cf..e2675cd 100644
--- a/index.js
+++ b/index.js
@@ -1,16 +1,16 @@
 'use strict';
-var path = require('path');
-var gutil = require('gulp-util');
-var through = require('through2');
-var tildify = require('tildify');
-var stringifyObject = require('stringify-object');
-var chalk = require('chalk');
-var objectAssign = require('object-assign');
-var plur = require('plur');
-var prop = chalk.blue;
-
-module.exports = function (opts) {
-	opts = objectAssign({
+const path = require('path');
+const gutil = require('gulp-util');
+const through = require('through2');
+const tildify = require('tildify');
+const stringifyObject = require('stringify-object');
+const chalk = require('chalk');
+const plur = require('plur');
+
+const prop = chalk.blue;
+
+module.exports = opts => {
+	opts = Object.assign({
 		title: 'gulp-debug:',
 		minimal: true
 	}, opts);
@@ -20,10 +20,10 @@ module.exports = function (opts) {
 		opts.minimal = false;
 	}
 
-	var count = 0;
+	let count = 0;
 
-	return through.obj(function (file, enc, cb) {
-		var full =
+	return through.obj((file, enc, cb) => {
+		const full =
 			'\n' +
 			(file.cwd ? 'cwd:   ' + prop(tildify(file.cwd)) : '') +
 			(file.base ? '\nbase:  ' + prop(tildify(file.base)) : '') +
@@ -31,14 +31,14 @@ module.exports = function (opts) {
 			(file.stat && opts.verbose ? '\nstat:  ' + prop(stringifyObject(file.stat, {indent: '       '}).replace(/[{}]/g, '').trim()) : '') +
 			'\n';
 
-		var output = opts.minimal ? prop(path.relative(process.cwd(), file.path)) : full;
+		const output = opts.minimal ? prop(path.relative(process.cwd(), file.path)) : full;
 
 		count++;
 
 		gutil.log(opts.title + ' ' + output);
 
 		cb(null, file);
-	}, function (cb) {
+	}, cb => {
 		gutil.log(opts.title + ' ' + chalk.green(count + ' ' + plur('item', count)));
 		cb();
 	});
diff --git a/package.json b/package.json
index ecf109e..f1d4cc4 100644
--- a/package.json
+++ b/package.json
@@ -7,13 +7,13 @@
   "author": {
     "name": "Sindre Sorhus",
     "email": "sindresorhus@gmail.com",
-    "url": "http://sindresorhus.com"
+    "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "scripts": {
-    "test": "mocha"
+    "test": "xo && mocha"
   },
   "files": [
     "index.js"
@@ -33,7 +33,6 @@
   "dependencies": {
     "chalk": "^1.0.0",
     "gulp-util": "^3.0.0",
-    "object-assign": "^4.0.1",
     "plur": "^2.0.0",
     "stringify-object": "^3.0.0",
     "through2": "^2.0.0",
@@ -44,6 +43,10 @@
     "mocha": "*",
     "proxyquire": "^1.0.1",
     "sinon": "^1.9.1",
-    "strip-ansi": "^3.0.0"
+    "strip-ansi": "^3.0.0",
+    "xo": "*"
+  },
+  "xo": {
+    "esnext": true
   }
 }
diff --git a/test.js b/test.js
index e86480a..67d6cb1 100644
--- a/test.js
+++ b/test.js
@@ -1,67 +1,69 @@
+/* eslint-env mocha */
 'use strict';
-var fs = require('fs');
-var assert = require('assert');
-var sinon = require('sinon');
-var gutil = require('gulp-util');
-var proxyquire = require('proxyquire');
-var stripAnsi = require('strip-ansi');
-
-var gutilStub = {
-	log: function () {
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert');
+const sinon = require('sinon');
+const gutil = require('gulp-util');
+const proxyquire = require('proxyquire');
+const stripAnsi = require('strip-ansi');
+
+const gutilStub = {
+	log() {
 		// uncomment the next line to see the log messages written by gulp-debug
 		// during test (by default they are swallowed by the sinon stub replacing the log method)
 		// gutil.log.apply(gutil.log, arguments);
 	}
 };
 
-var debug = proxyquire('./', {
+const debug = proxyquire('./', {
 	'gulp-util': gutilStub
 });
 
-var file;
+let file;
 
-beforeEach(function () {
+beforeEach(() => {
 	sinon.spy(gutilStub, 'log');
 	file = new gutil.File({
 		cwd: __dirname,
 		base: __dirname,
-		path: __dirname + '/foo.js',
+		path: path.join(__dirname, 'foo.js'),
 		stat: fs.statSync('test.js'),
 		contents: new Buffer('Lorem ipsum dolor sit amet, consectetuer adipiscing elit.')
 	});
 });
 
-afterEach(function () {
+afterEach(() => {
 	gutilStub.log.restore();
 });
 
-it('should output debug info', function (cb) {
-	var stream = debug({title: 'unicorn:'});
+it('should output debug info', cb => {
+	const stream = debug({title: 'unicorn:'});
 
-	stream.write(file, 'utf8', function () {
+	stream.write(file, 'utf8', () => {
 		assert(gutilStub.log.calledOnce);
-		assert.strictEqual(stripAnsi(gutilStub.log.firstCall.args[0]).split('\n')[0],  'unicorn: foo.js');
+		assert.strictEqual(stripAnsi(gutilStub.log.firstCall.args[0]).split('\n')[0], 'unicorn: foo.js');
 		cb();
 	});
 });
 
-it('should output singular item count', function (cb) {
-	var stream = debug({title: 'unicorn:'});
+it('should output singular item count', cb => {
+	const stream = debug({title: 'unicorn:'});
 
-	stream.on('finish', function () {
+	stream.on('finish', () => {
 		assert.strictEqual(stripAnsi(gutilStub.log.lastCall.args[0]).split('\n')[0], 'unicorn: 1 item');
 		cb();
 	});
 
-	stream.write(file, function () {
+	stream.write(file, () => {
 		stream.end();
 	});
 });
 
-it('should output zero item count', function (cb) {
-	var stream = debug({title: 'unicorn:'});
+it('should output zero item count', cb => {
+	const stream = debug({title: 'unicorn:'});
 
-	stream.on('finish', function () {
+	stream.on('finish', () => {
 		assert.strictEqual(stripAnsi(gutilStub.log.lastCall.args[0]).split('\n')[0], 'unicorn: 0 items');
 		cb();
 	});
@@ -69,16 +71,16 @@ it('should output zero item count', function (cb) {
 	stream.end();
 });
 
-it('should output plural item count', function (cb) {
-	var stream = debug({title: 'unicorn:'});
+it('should output plural item count', cb => {
+	const stream = debug({title: 'unicorn:'});
 
-	stream.on('finish', function () {
+	stream.on('finish', () => {
 		assert.strictEqual(stripAnsi(gutilStub.log.lastCall.args[0]).split('\n')[0], 'unicorn: 2 items');
 		cb();
 	});
 
-	stream.write(file, function () {
-		stream.write(file, function () {
+	stream.write(file, () => {
+		stream.write(file, () => {
 			stream.end();
 		});
 	});