diff --git a/index.d.ts b/index.d.ts
index 2d059a7..e728044 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,67 +1,78 @@
-export interface Options {
-	/**
-	 * Overwrite existing file.
-	 *
-	 * @default true
-	 */
-	readonly overwrite?: boolean;
+declare namespace cpFile {
+	interface Options {
+		/**
+		Overwrite existing file.
+
+		@default true
+		*/
+		readonly overwrite?: boolean;
+	}
+
+	interface ProgressData {
+		/**
+		Absolute path to source.
+		*/
+		src: string;
+
+		/**
+		Absolute path to destination.
+		*/
+		dest: string;
+
+		/**
+		File size in bytes.
+		*/
+		size: number;
+
+		/**
+		Copied size in bytes.
+		*/
+		written: number;
+
+		/**
+		Copied percentage, a value between `0` and `1`.
+		*/
+		percent: number;
+	}
+
+	interface ProgressEmitter {
+		/**
+		For empty files, the `progress` event is emitted only once.
+		*/
+		on(event: 'progress', handler: (data: ProgressData) => void): Promise<void>;
+	}
 }
 
-export interface ProgressData {
+declare const cpFile: {
 	/**
-	 * Absolute path to source.
-	 */
-	src: string;
+	Copy a file.
 
-	/**
-	 * Absolute path to destination.
-	 */
-	dest: string;
+	@param source - File you want to copy.
+	@param destination - Where you want the file copied.
+	@returns A `Promise` that resolves when the file is copied.
 
-	/**
-	 * File size in bytes.
-	 */
-	size: number;
+	@example
+	```
+	import cpFile = require('cp-file');
 
-	/**
-	 * Copied size in bytes.
-	 */
-	written: number;
+	(async () => {
+		await cpFile('source/unicorn.png', 'destination/unicorn.png');
+		console.log('File copied');
+	})();
+	```
+	*/
+	(source: string, destination: string, options?: cpFile.Options): Promise<void> & cpFile.ProgressEmitter;
 
 	/**
-	 * Copied percentage, a value between `0` and `1`.
-	 */
-	percent: number;
-}
+	Copy a file synchronously.
 
-export interface ProgressEmitter {
-	/**
-	 * For empty files, the `progress` event is emitted only once.
-	 */
-	on(event: 'progress', handler: (data: ProgressData) => void): Promise<void>;
-}
+	@param source - File you want to copy.
+	@param destination - Where you want the file copied.
+	*/
+	sync(source: string, destination: string, options?: cpFile.Options): void;
 
-/**
- * Copy a file.
- *
- * @param source - File you want to copy.
- * @param destination - Where you want the file copied.
- * @returns A `Promise` that resolves when the file is copied.
- */
-export default function cpFile(
-	source: string,
-	destination: string,
-	options?: Options
-): Promise<void> & ProgressEmitter;
+	// TODO: Remove this for the next major release
+	default: typeof cpFile;
+};
 
-/**
- * Copy a file synchronously.
- *
- * @param source - File you want to copy.
- * @param destination - Where you want the file copied.
- */
-export function sync(
-	source: string,
-	destination: string,
-	options?: Options
-): void;
+export = cpFile;
diff --git a/index.js b/index.js
index 7b64548..5dbcf56 100644
--- a/index.js
+++ b/index.js
@@ -64,6 +64,7 @@ const cpFile = (source, destination, options) => {
 };
 
 module.exports = cpFile;
+// TODO: Remove this for the next major release
 module.exports.default = cpFile;
 
 const checkSourceIsFile = (stat, source) => {
diff --git a/index.test-d.ts b/index.test-d.ts
index d2eb910..02b31a9 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -1,7 +1,7 @@
-import {expectType} from 'tsd-check';
-import cpFile, {sync as cpFileSync, ProgressEmitter, ProgressData} from '.';
+import {expectType} from 'tsd';
+import cpFile = require('.');
+import {ProgressEmitter, ProgressData} from '.';
 
-// `cpFile`
 expectType<Promise<void> & ProgressEmitter>(
 	cpFile('source/unicorn.png', 'destination/unicorn.png')
 );
@@ -9,19 +9,23 @@ expectType<Promise<void> & ProgressEmitter>(
 	cpFile('source/unicorn.png', 'destination/unicorn.png', {overwrite: false})
 );
 expectType<Promise<void>>(
-	cpFile('source/unicorn.png', 'destination/unicorn.png').on('progress', data => {
-		expectType<ProgressData>(data);
+	cpFile('source/unicorn.png', 'destination/unicorn.png').on(
+		'progress',
+		data => {
+			expectType<ProgressData>(data);
 
-		expectType<string>(data.src);
-		expectType<string>(data.dest);
-		expectType<number>(data.size);
-		expectType<number>(data.written);
-		expectType<number>(data.percent);
-	})
+			expectType<string>(data.src);
+			expectType<string>(data.dest);
+			expectType<number>(data.size);
+			expectType<number>(data.written);
+			expectType<number>(data.percent);
+		}
+	)
 );
 
-// `cpFileSync`
-expectType<void>(cpFileSync('source/unicorn.png', 'destination/unicorn.png'));
+expectType<void>(cpFile.sync('source/unicorn.png', 'destination/unicorn.png'));
 expectType<void>(
-	cpFileSync('source/unicorn.png', 'destination/unicorn.png', {overwrite: false})
+	cpFile.sync('source/unicorn.png', 'destination/unicorn.png', {
+		overwrite: false
+	})
 );
diff --git a/package.json b/package.json
index 0330b70..fd7387e 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
 		"node": ">=6"
 	},
 	"scripts": {
-		"test": "xo && nyc ava && tsd-check"
+		"test": "xo && nyc ava && tsd"
 	},
 	"files": [
 		"cp-file-error.js",
@@ -52,15 +52,15 @@
 		"safe-buffer": "^5.0.1"
 	},
 	"devDependencies": {
-		"ava": "^1.2.1",
+		"ava": "^1.4.1",
 		"clear-module": "^3.1.0",
-		"coveralls": "^3.0.0",
-		"del": "^4.0.0",
+		"coveralls": "^3.0.3",
+		"del": "^4.1.0",
 		"import-fresh": "^3.0.0",
 		"nyc": "^13.3.0",
-		"sinon": "^7.2.6",
-		"tsd-check": "^0.3.0",
-		"uuid": "^3.0.0",
+		"sinon": "^7.3.1",
+		"tsd": "^0.7.2",
+		"uuid": "^3.3.2",
 		"xo": "^0.24.0"
 	}
 }