diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..0999ed2
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,70 @@
+declare namespace ip {
+	interface Options {
+		/**
+		Only match an exact string. Useful with `RegExp#test()` to check if a string is an IP address. *(`false` matches any IP address in a string)*
+
+		@default false
+		*/
+		readonly exact?: boolean;
+
+		/**
+		Include boundaries in the regex. When `true`, `192.168.0.2000000000` will report as an invalid IPv4 address. If this option is not set, the mentioned IPv4 address would report as valid (ignoring the trailing zeros).
+
+		@default false
+		*/
+		readonly includeBoundaries?: boolean;
+	}
+}
+
+declare const ip: {
+	/**
+	Regular expression for matching IP addresses.
+
+	@returns A regex for matching both IPv4 and IPv6.
+
+	@example
+	```
+	import ipRegex = require('ip-regex');
+
+	// Contains an IP address?
+	ipRegex().test('unicorn 192.168.0.1');
+	//=> true
+
+	// Is an IP address?
+	ipRegex({exact: true}).test('unicorn 192.168.0.1');
+	//=> false
+
+	'unicorn 192.168.0.1 cake 1:2:3:4:5:6:7:8 rainbow'.match(ipRegex());
+	//=> ['192.168.0.1', '1:2:3:4:5:6:7:8']
+
+	// Contains an IP address?
+	ipRegex({includeBoundaries: true}).test('192.168.0.2000000000');
+	//=> false
+
+	// Matches an IP address?
+	'192.168.0.2000000000'.match(ipRegex({includeBoundaries: true}));
+	//=> null
+	```
+	*/
+	(options?: ip.Options): RegExp;
+
+	/**
+	@returns A regex for matching IPv4.
+	*/
+	v4(options?: ip.Options): RegExp;
+
+	/**
+	@returns A regex for matching IPv6.
+
+	@example
+	```
+	import ipRegex = require('ip-regex');
+
+	ipRegex.v6({exact: true}).test('1:2:3:4:5:6:7:8');
+	//=> true
+	```
+	*/
+	v6(options?: ip.Options): RegExp;
+};
+
+export = ip;
diff --git a/index.test-d.ts b/index.test-d.ts
new file mode 100644
index 0000000..df2c872
--- /dev/null
+++ b/index.test-d.ts
@@ -0,0 +1,13 @@
+import {expectType} from 'tsd';
+import ipRegex = require('.');
+
+const options: ipRegex.Options = {};
+expectType<RegExp>(ipRegex());
+expectType<RegExp>(ipRegex({exact: true}));
+expectType<RegExp>(ipRegex({includeBoundaries: true}));
+expectType<RegExp>(ipRegex.v4());
+expectType<RegExp>(ipRegex.v4({exact: true}));
+expectType<RegExp>(ipRegex.v4({includeBoundaries: true}));
+expectType<RegExp>(ipRegex.v6());
+expectType<RegExp>(ipRegex.v6({exact: true}));
+expectType<RegExp>(ipRegex.v6({includeBoundaries: true}));
diff --git a/package.json b/package.json
index d51cca0..16ade6d 100644
--- a/package.json
+++ b/package.json
@@ -13,10 +13,11 @@
 		"node": ">=8"
 	},
 	"scripts": {
-		"test": "xo && ava"
+		"test": "xo && ava && tsd"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"ip",
@@ -36,7 +37,8 @@
 		"validate"
 	],
 	"devDependencies": {
-		"ava": "^1.1.0",
+		"ava": "^1.4.1",
+		"tsd": "^0.7.2",
 		"xo": "^0.24.0"
 	}
 }