diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..78eda93
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,62 @@
+import {IOptions as GlobOptions} from 'glob';
+
+interface Options extends Readonly<GlobOptions> {
+	/**
+	 * Allow deleting the current working directory and outside.
+	 *
+	 * @default false
+	 */
+	readonly force?: boolean;
+
+	/**
+	 * See what would be deleted.
+	 *
+	 * @default false
+	 *
+	 * @example
+	 *
+	 * import del from 'del';
+	 *
+	 * (async () => {
+	 *     const deletedPaths = await del(['tmp/*.js'], {dryRun: true});
+	 *
+	 *     console.log('Files and folders that would be deleted:\n', deletedPaths.join('\n'));
+	 * })();
+	 */
+	readonly dryRun?: boolean;
+
+	/**
+	 * Concurrency limit. Minimum: `1`.
+	 *
+	 * @default Infinity
+	 */
+	readonly concurrency?: number;
+}
+
+/**
+ * Delete files and folders using glob patterns.
+ *
+ * @param patterns - See supported minimatch [patterns](https://github.com/isaacs/minimatch#usage).
+ * - [Pattern examples with expected matches](https://github.com/sindresorhus/multimatch/blob/master/test/test.js)
+ * - [Quick globbing pattern overview](https://github.com/sindresorhus/multimatch#globbing-patterns)
+ * @param options - See the [`glob` options](https://github.com/isaacs/node-glob#options).
+ * @returns A promise for an array of deleted paths.
+ */
+export default function del(
+	patterns: string | ReadonlyArray<string>,
+	options?: Options
+): Promise<string[]>;
+
+/**
+ * Synchronously delete files and folders using glob patterns.
+ *
+ * @param patterns - See supported minimatch [patterns](https://github.com/isaacs/minimatch#usage).
+ * - [Pattern examples with expected matches](https://github.com/sindresorhus/multimatch/blob/master/test/test.js)
+ * - [Quick globbing pattern overview](https://github.com/sindresorhus/multimatch#globbing-patterns)
+ * @param options - See the [`glob` options](https://github.com/isaacs/node-glob#options).
+ * @returns An array of deleted paths.
+ */
+export function sync(
+	patterns: string | ReadonlyArray<string>,
+	options?: Options
+): string[];
diff --git a/index.js b/index.js
index 714ebba..248b92b 100644
--- a/index.js
+++ b/index.js
@@ -19,7 +19,7 @@ function safeCheck(file) {
 	}
 }
 
-module.exports = (patterns, options) => {
+const del = (patterns, options) => {
 	options = Object.assign({}, options);
 
 	const {force, dryRun} = options;
@@ -43,6 +43,9 @@ module.exports = (patterns, options) => {
 	return globby(patterns, options).then(files => pMap(files, mapper, options));
 };
 
+module.exports = del;
+module.exports.default = del;
+
 module.exports.sync = (patterns, options) => {
 	options = Object.assign({}, options);
 
diff --git a/index.test-d.ts b/index.test-d.ts
new file mode 100644
index 0000000..d2ea883
--- /dev/null
+++ b/index.test-d.ts
@@ -0,0 +1,22 @@
+import {expectType} from 'tsd-check';
+import del, {sync as delSync} from '.';
+
+let paths = ['tmp/*.js', '!tmp/unicorn.js'];
+
+// Del
+expectType<Promise<string[]>>(del('tmp/*.js'));
+expectType<Promise<string[]>>(del(paths));
+
+expectType<Promise<string[]>>(del(paths, {force: true}));
+expectType<Promise<string[]>>(del(paths, {dryRun: true}));
+expectType<Promise<string[]>>(del(paths, {concurrency: 20}));
+expectType<Promise<string[]>>(del(paths, {cwd: ''}));
+
+// Del (sync)
+expectType<string[]>(delSync('tmp/*.js'));
+expectType<string[]>(delSync(paths));
+
+expectType<string[]>(delSync(paths, {force: true}));
+expectType<string[]>(delSync(paths, {dryRun: true}));
+expectType<string[]>(delSync(paths, {concurrency: 20}));
+expectType<string[]>(delSync(paths, {cwd: ''}));
diff --git a/package.json b/package.json
index 3b1c5a1..351f7ad 100644
--- a/package.json
+++ b/package.json
@@ -13,10 +13,11 @@
 		"node": ">=6"
 	},
 	"scripts": {
-		"test": "xo && ava"
+		"test": "xo && ava && tsd-check"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"delete",
@@ -53,9 +54,10 @@
 		"rimraf": "^2.6.2"
 	},
 	"devDependencies": {
-		"ava": "^0.25.0",
-		"make-dir": "^1.3.0",
+		"ava": "^1.2.1",
+		"make-dir": "^2.0.0",
 		"tempy": "^0.2.1",
-		"xo": "^0.23.0"
+		"tsd-check": "^0.3.0",
+		"xo": "^0.24.0"
 	}
 }