diff --git a/package.json b/package.json
index 90625cc..dcc997d 100644
--- a/package.json
+++ b/package.json
@@ -46,14 +46,15 @@
 		"types"
 	],
 	"devDependencies": {
-		"@sindresorhus/tsconfig": "^0.3.0",
+		"@sindresorhus/tsconfig": "^0.4.0",
 		"@types/jsdom": "^12.2.3",
 		"@types/node": "^12.0.0",
 		"@types/zen-observable": "^0.8.0",
 		"@typescript-eslint/eslint-plugin": "^1.5.0",
-		"ava": "^1.4.1",
-		"del-cli": "^1.1.0",
-		"eslint-config-xo-typescript": "^0.10.1",
+		"@typescript-eslint/parser": "^1.10.2",
+		"ava": "^2.1.0",
+		"del-cli": "^2.0.0",
+		"eslint-config-xo-typescript": "^0.14.0",
 		"jsdom": "^15.0.0",
 		"rxjs": "^6.4.0",
 		"tempy": "^0.3.0",
@@ -85,6 +86,8 @@
 			"BigUint64Array"
 		],
 		"rules": {
+			"import/first": "off",
+			"import/newline-after-import": "off",
 			"@typescript-eslint/explicit-function-return-type": "off"
 		}
 	}
diff --git a/source/index.ts b/source/index.ts
index 4cd388d..e8c226e 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -2,7 +2,6 @@
 /// <reference lib="dom"/>
 
 // TODO: Use the `URL` global when targeting Node.js 10
-// eslint-disable-next-line @typescript-eslint/no-require-imports
 const URLGlobal = typeof URL === 'undefined' ? require('url').URL : URL;
 
 export type Class<T = unknown> = new (...args: any[]) => T;
diff --git a/test/test.ts b/test/test.ts
index ce01004..cde7374 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -1,15 +1,14 @@
-import fs from 'fs';
-import net from 'net';
-import Stream from 'stream';
-import util from 'util';
-import tempy from 'tempy';
+import fs = require('fs');
+import net = require('net');
+import Stream = require('stream');
+import {inspect} from 'util';
+import tempy = require('tempy');
 import test, {ExecutionContext} from 'ava';
 import {JSDOM} from 'jsdom';
 import {Subject, Observable} from 'rxjs';
-import ZenObservable from 'zen-observable';
+import ZenObservable = require('zen-observable');
 import is, {TypeName} from '../source';
 
-// eslint-disable-next-line @typescript-eslint/no-require-imports
 const URLGlobal = typeof URL === 'undefined' ? require('url').URL : URL;
 
 const isNode10orHigher = Number(process.versions.node.split('.')[0]) >= 10;
@@ -472,7 +471,7 @@ const testType = (t: ExecutionContext, type: string, exclude?: string[]) => {
 		const assert = isTypeUnderTest ? t.true.bind(t) : t.false.bind(t);
 
 		for (const fixture of fixtures) {
-			assert(testIs(fixture), `Value: ${util.inspect(fixture)}`);
+			assert(testIs(fixture), `Value: ${inspect(fixture)}`);
 
 			if (isTypeUnderTest && typename) {
 				t.is(is(fixture), typename);