diff --git a/fixtures/view-codes.js b/fixtures/view-codes.js
index a921899..9837a5c 100644
--- a/fixtures/view-codes.js
+++ b/fixtures/view-codes.js
@@ -1,25 +1,25 @@
 'use strict';
-const ansiRegex = require('..');
 const ansiCodes = require('./ansi-codes');
+const ansiRegex = require('..');
 
 const allCodes = {};
 const supported = [];
 const unsupported = [];
 
 function addCodesToTest(codes) {
-	for (const code of Object.keys(codes)) {
-		allCodes[code] = codes[code];
+	for (const [key, value] of Object.entries(codes)) {
+		allCodes[key] = value;
 	}
 }
 
 function identifySupportedCodes() {
 	let codeSupport = {};
 
-	for (const code of Object.keys(allCodes)) {
+	for (const [code, value] of Object.keys(allCodes)) {
 		codeSupport = {
 			code,
 			matches: `\u001B${code}`.match(ansiRegex()),
-			description: allCodes[code][0]
+			description: value[0]
 		};
 
 		if (codeSupport.matches !== null && codeSupport.matches[0] === `\u001B${code}`) {
@@ -34,15 +34,15 @@ function displaySupport() {
 	process.stdout.write('\u001B[32m');
 
 	console.log('SUPPORTED');
-	for (const el of supported) {
-		console.log(el);
+	for (const element of supported) {
+		console.log(element);
 	}
 
 	process.stdout.write('\u001B[31m');
 	console.log('UNSUPPORTED');
 
-	for (const el of unsupported) {
-		console.log(el);
+	for (const element of unsupported) {
+		console.log(element);
 	}
 
 	process.stdout.write('\u001B[0m');
diff --git a/index.test-d.ts b/index.test-d.ts
index 77fed65..20a68a4 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -1,5 +1,5 @@
 import {expectType} from 'tsd';
-import ansiRegex from '.';
+import ansiRegex = require('.');
 
 expectType<RegExp>(ansiRegex());
 expectType<RegExp>(ansiRegex({onlyFirst: true}));
diff --git a/package.json b/package.json
index 0717ee9..c75e62c 100644
--- a/package.json
+++ b/package.json
@@ -48,8 +48,8 @@
 		"pattern"
 	],
 	"devDependencies": {
-		"ava": "^1.4.1",
+		"ava": "^2.4.0",
 		"tsd": "^0.9.0",
-		"xo": "^0.24.0"
+		"xo": "^0.25.3"
 	}
 }
diff --git a/readme.md b/readme.md
index 1c8abb4..3c2b77c 100644
--- a/readme.md
+++ b/readme.md
@@ -34,12 +34,14 @@ ansiRegex().test('cake');
 
 ## API
 
-### ansiRegex([options])
+### ansiRegex(options?)
 
 Returns a regex for matching ANSI escape codes.
 
 #### options
 
+Type: `object`
+
 ##### onlyFirst
 
 Type: `boolean`<br>