diff --git a/.editorconfig b/.editorconfig
index 8311fe1..98a761d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,4 +1,3 @@
-# editorconfig.org
 root = true
 
 [*]
@@ -8,9 +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/.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/.npmrc b/.npmrc
new file mode 100644
index 0000000..43c97e7
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+package-lock=false
diff --git a/.travis.yml b/.travis.yml
index dedfc07..c9c9848 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,4 @@
 sudo: false
 language: node_js
 node_js:
-  - 'iojs'
-  - '0.12'
-  - '0.10'
+  - '6'
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..12a94e1
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,15 @@
+/**
+ * Create an array with values that are present in the first array but not additional ones.
+ *
+ * @param array - The array to compare against.
+ * @param values - The arrays with values to be excluded.
+ * @returns A new array of filtered values.
+ *
+ * @example
+ *
+ * import arrayDiffer from 'array-differ';
+ *
+ * arrayDiffer([2, 3, 4], [3, 50]);
+ * //=> [2, 4]
+ */
+export default function arrayDiffer<T>(array: ArrayLike<T>, ...values: ArrayLike<T>[]): T[];
diff --git a/index.js b/index.js
index fbe2ed2..1ef9418 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,9 @@
 'use strict';
-module.exports = function (arr) {
-	var rest = [].concat.apply([], [].slice.call(arguments, 1));
-	return arr.filter(function (el) {
-		return rest.indexOf(el) === -1;
-	});
+
+const arrayDiffer = (array, ...values) => {
+	const rest = new Set([].concat(...values));
+	return array.filter(x => !rest.has(x));
 };
+
+module.exports = arrayDiffer;
+module.exports.default = arrayDiffer;
diff --git a/index.test-d.ts b/index.test-d.ts
new file mode 100644
index 0000000..6ad424e
--- /dev/null
+++ b/index.test-d.ts
@@ -0,0 +1,5 @@
+import {expectType} from 'tsd-check';
+import arrayDiffer from '.';
+
+expectType<string[]>(arrayDiffer(['a', 'b', 'c'], ['b'], ['c']));
+expectType<number[]>(arrayDiffer([1, 2, 3], [2], [3]));
diff --git a/package.json b/package.json
index a8c4683..371229e 100644
--- a/package.json
+++ b/package.json
@@ -1,32 +1,35 @@
 {
-  "name": "array-differ",
-  "version": "1.0.0",
-  "description": "Create an array with values that are present in the first input array but not additional ones",
-  "license": "MIT",
-  "repository": "sindresorhus/array-differ",
-  "author": {
-    "name": "Sindre Sorhus",
-    "email": "sindresorhus@gmail.com",
-    "url": "http://sindresorhus.com"
-  },
-  "engines": {
-    "node": ">=0.10.0"
-  },
-  "scripts": {
-    "test": "mocha"
-  },
-  "files": [
-    "index.js"
-  ],
-  "keywords": [
-    "array",
-    "difference",
-    "diff",
-    "differ",
-    "filter",
-    "exclude"
-  ],
-  "devDependencies": {
-    "mocha": "*"
-  }
+	"name": "array-differ",
+	"version": "2.1.0",
+	"description": "Create an array with values that are present in the first input array but not additional ones",
+	"license": "MIT",
+	"repository": "sindresorhus/array-differ",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=6"
+	},
+	"scripts": {
+		"test": "xo && ava && tsd-check"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"array",
+		"difference",
+		"diff",
+		"differ",
+		"filter",
+		"exclude"
+	],
+	"devDependencies": {
+		"ava": "^1.2.1",
+		"tsd-check": "^0.3.0",
+		"xo": "^0.24.0"
+	}
 }
diff --git a/readme.md b/readme.md
index 68f5d36..b98cc06 100644
--- a/readme.md
+++ b/readme.md
@@ -5,15 +5,15 @@
 
 ## Install
 
-```sh
-$ npm install --save array-differ
+```
+$ npm install array-differ
 ```
 
 
 ## Usage
 
 ```js
-var arrayDiffer = require('array-differ');
+const arrayDiffer = require('array-differ');
 
 arrayDiffer([2, 3, 4], [3, 50]);
 //=> [2, 4]
@@ -21,21 +21,21 @@ arrayDiffer([2, 3, 4], [3, 50]);
 
 ## API
 
-### arrayDiffer(input, values, [values, ...])
+### arrayDiffer(input, ...values)
 
-Returns the new array.
+Returns a new array.
 
 #### input
 
-Type: `array`
+Type: `unknown[]`
 
 #### values
 
-Type: `array`
+Type: `unknown[]`
 
 Arrays of values to exclude.
 
 
 ## License
 
-MIT © [Sindre Sorhus](http://sindresorhus.com)
+MIT © [Sindre Sorhus](https://sindresorhus.com)
diff --git a/test.js b/test.js
index d3f3858..5375bbf 100644
--- a/test.js
+++ b/test.js
@@ -1,7 +1,7 @@
-'use strict';
-var assert = require('assert');
-var arrayDifference = require('./');
+import test from 'ava';
+import arrayDiffer from '.';
 
-it('should filter out the difference', function () {
-	assert.deepEqual(arrayDifference([2, 3, 4], [3, 50, 60]), [2, 4]);
+test('main', t => {
+	t.deepEqual(arrayDiffer([2, 3, 4], [3, 50, 60]), [2, 4]);
+	t.deepEqual(arrayDiffer([2, 3, 4], [3, 50], [2, 60]), [4]);
 });