diff --git a/.gitattributes b/.gitattributes
index 391f0a4..6313b56 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1 @@
-* text=auto
-*.js text eol=lf
+* text=auto eol=lf
diff --git a/.travis.yml b/.travis.yml
index 7d69d74..2ae9d62 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
 node_js:
+  - '10'
   - '8'
   - '6'
-  - '4'
diff --git a/example-all.js b/example-all.js
index 4ca0342..adb2bb0 100644
--- a/example-all.js
+++ b/example-all.js
@@ -1,5 +1,4 @@
 'use strict';
-/* eslint-disable unicorn/no-process-exit */
 const readline = require('readline');
 const logUpdate = require('log-update');
 const cliSpinners = require('.');
@@ -11,7 +10,7 @@ let next;
 let scrutator;
 
 const showNextFrame = () => {
-	const frames = cliSpinners[spinners[spinner]].frames;
+	const {frames} = cliSpinners[spinners[spinner]];
 	logUpdate(frames[frame++ % frames.length] + ' ' + spinners[spinner]);
 };
 
@@ -26,6 +25,7 @@ const showNextSpinner = () => {
 		next = setInterval(showNextFrame, s.interval);
 		scrutator = setTimeout(showNextSpinner, Math.max(s.interval * s.frames.length, 1000));
 	} else {
+		// eslint-disable-next-line unicorn/no-process-exit
 		process.exit(0);
 	}
 };
@@ -36,6 +36,7 @@ process.stdin.setRawMode(true);
 
 process.stdin.on('keypress', (str, key) => {
 	if (key.ctrl && key.name === 'c') {
+		// eslint-disable-next-line unicorn/no-process-exit
 		process.exit(130);
 	}
 
diff --git a/example.js b/example.js
index e1aad17..8615b25 100644
--- a/example.js
+++ b/example.js
@@ -6,7 +6,7 @@ const spinner = cliSpinners[process.argv[2] || 'dots'];
 let i = 0;
 
 setInterval(() => {
-	const frames = spinner.frames;
+	const {frames} = spinner;
 	logUpdate(frames[i = ++i % frames.length] + ' Unicorns');
 }, spinner.interval);
 
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..0430880
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,99 @@
+export type SpinnerName =
+	| 'dots'
+	| 'dots2'
+	| 'dots3'
+	| 'dots4'
+	| 'dots5'
+	| 'dots6'
+	| 'dots7'
+	| 'dots8'
+	| 'dots9'
+	| 'dots10'
+	| 'dots11'
+	| 'dots12'
+	| 'line'
+	| 'line2'
+	| 'pipe'
+	| 'simpleDots'
+	| 'simpleDotsScrolling'
+	| 'star'
+	| 'star2'
+	| 'flip'
+	| 'hamburger'
+	| 'growVertical'
+	| 'growHorizontal'
+	| 'balloon'
+	| 'balloon2'
+	| 'noise'
+	| 'bounce'
+	| 'boxBounce'
+	| 'boxBounce2'
+	| 'triangle'
+	| 'arc'
+	| 'circle'
+	| 'squareCorners'
+	| 'circleQuarters'
+	| 'circleHalves'
+	| 'squish'
+	| 'toggle'
+	| 'toggle2'
+	| 'toggle3'
+	| 'toggle4'
+	| 'toggle5'
+	| 'toggle6'
+	| 'toggle7'
+	| 'toggle8'
+	| 'toggle9'
+	| 'toggle10'
+	| 'toggle11'
+	| 'toggle12'
+	| 'toggle13'
+	| 'arrow'
+	| 'arrow2'
+	| 'arrow3'
+	| 'bouncingBar'
+	| 'bouncingBall'
+	| 'smiley'
+	| 'monkey'
+	| 'hearts'
+	| 'clock'
+	| 'earth'
+	| 'moon'
+	| 'runner'
+	| 'pong'
+	| 'shark'
+	| 'dqpb'
+	| 'weather'
+	| 'christmas'
+	| 'grenade'
+	| 'point'
+	| 'layer';
+
+export interface Spinner {
+	/**
+	 * Recommended interval.
+	 */
+	readonly interval: number;
+
+	/**
+	 * A list of frames to show for the spinner.
+	 */
+	readonly frames: string[];
+}
+
+/**
+ * 60+ spinners for use in the terminal.
+ *
+ * @example
+ *
+ * const cliSpinners = require('cli-spinners');
+ * console.log(cliSpinners.dots);
+ *
+ * // {
+ * //   interval: 80,
+ * //   frames: ['⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏']
+ * // }
+ */
+declare const cliSpinners: {readonly [spinnerName in SpinnerName]: Spinner};
+
+export default cliSpinners;
diff --git a/index.js b/index.js
index 465d222..b61a7fa 100644
--- a/index.js
+++ b/index.js
@@ -1,2 +1,6 @@
 'use strict';
-module.exports = require('./spinners.json');
+
+const spinners = Object.assign({}, require('./spinners.json'));
+
+module.exports = spinners;
+module.exports.default = spinners;
diff --git a/index.test-d.ts b/index.test-d.ts
new file mode 100644
index 0000000..1b2c9d2
--- /dev/null
+++ b/index.test-d.ts
@@ -0,0 +1,4 @@
+import {expectType} from 'tsd-check';
+import cliSpinners, {Spinner} from '.';
+
+expectType<Spinner>(cliSpinners.dots);
diff --git a/package.json b/package.json
index 7564d52..355128e 100644
--- a/package.json
+++ b/package.json
@@ -13,12 +13,13 @@
     "node": ">=4"
   },
   "scripts": {
-    "test": "xo && ava",
+    "test": "xo && ava && tsd-check",
     "asciicast": "asciinema rec --command='node example-all.js' --title='cli-spinner' --quiet"
   },
   "files": [
-    "index.js",
-    "spinners.json"
+		"index.js",
+		"index.d.ts",
+		"spinners.json"
   ],
   "keywords": [
     "cli",
@@ -38,8 +39,9 @@
     "json"
   ],
   "devDependencies": {
-    "ava": "*",
+    "ava": "^1.2.1",
     "log-update": "^2.1.0",
-    "xo": "*"
+    "tsd-check": "^0.3.0",
+    "xo": "^0.24.0"
   }
 }
diff --git a/test.js b/test.js
index 0688b6c..d4dd2cd 100644
--- a/test.js
+++ b/test.js
@@ -1,7 +1,7 @@
 import test from 'ava';
 import m from '.';
 
-test(t => {
+test('api', t => {
 	t.is(typeof m, 'object');
 	t.is(m.dots.interval, 80);
 	t.true(Array.isArray(m.dots.frames));