diff --git a/.travis.yml b/.travis.yml
index f3fa8cd..d2442b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
 language: node_js
 node_js:
   - '10'
-  - '8'
diff --git a/package.json b/package.json
index e34361a..cc9a373 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
 	},
 	"main": "dist",
 	"engines": {
-		"node": ">=8"
+		"node": ">=10"
 	},
 	"scripts": {
 		"build": "del dist && tsc",
@@ -80,6 +80,11 @@
 		"extensions": [
 			"ts"
 		],
+		"globals": [
+			"BigInt",
+			"BigInt64Array",
+			"BigUint64Array"
+		],
 		"rules": {
 			"@typescript-eslint/explicit-function-return-type": "off"
 		}
diff --git a/source/index.ts b/source/index.ts
index a819a5d..c0038e5 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -1,11 +1,6 @@
-/// <reference lib="es2017"/>
-/// <reference lib="esnext.asynciterable"/>
+/// <reference lib="esnext"/>
 /// <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;
 
 export const enum TypeName {
@@ -14,6 +9,7 @@ export const enum TypeName {
 	undefined = 'undefined',
 	string = 'string',
 	number = 'number',
+	bigint = 'BigInt',
 	symbol = 'symbol',
 	Function = 'Function',
 	Generator = 'Generator',
@@ -39,6 +35,8 @@ export const enum TypeName {
 	Uint32Array = 'Uint32Array',
 	Float32Array = 'Float32Array',
 	Float64Array = 'Float64Array',
+	BigInt64Array = 'BigInt64Array',
+	BigUint64Array = 'BigUint64Array',
 	ArrayBuffer = 'ArrayBuffer',
 	SharedArrayBuffer = 'SharedArrayBuffer',
 	DataView = 'DataView',
@@ -77,6 +75,8 @@ function is(value: unknown): TypeName {
 			return TypeName.string;
 		case 'number':
 			return TypeName.number;
+		case 'bigint':
+			return TypeName.bigint;
 		case 'symbol':
 			return TypeName.symbol;
 		default:
@@ -115,6 +115,7 @@ const isObject = (value: unknown): value is object => typeof value === 'object';
 is.undefined = isOfType<undefined>('undefined');
 is.string = isOfType<string>('string');
 is.number = isOfType<number>('number');
+is.bigint = isOfType<bigint>('bigint');
 
 // eslint-disable-next-line @typescript-eslint/ban-types
 is.function_ = isOfType<Function>('function');
@@ -175,6 +176,8 @@ is.int32Array = isObjectOfType<Int32Array>(TypeName.Int32Array);
 is.uint32Array = isObjectOfType<Uint32Array>(TypeName.Uint32Array);
 is.float32Array = isObjectOfType<Float32Array>(TypeName.Float32Array);
 is.float64Array = isObjectOfType<Float64Array>(TypeName.Float64Array);
+is.bigint64Array = isObjectOfType<BigInt64Array>(TypeName.BigInt64Array);
+is.biguint64Array = isObjectOfType<BigUint64Array>(TypeName.BigUint64Array);
 
 is.arrayBuffer = isObjectOfType<ArrayBuffer>(TypeName.ArrayBuffer);
 is.sharedArrayBuffer = isObjectOfType<SharedArrayBuffer>(TypeName.SharedArrayBuffer);
@@ -189,7 +192,7 @@ is.urlString = (value: unknown): value is string => {
 	}
 
 	try {
-		new URLGlobal(value); // eslint-disable-line no-new
+		new URL(value); // eslint-disable-line no-new
 		return true;
 	} catch {
 		return false;
diff --git a/test/test.ts b/test/test.ts
index 363d647..69e47d9 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -2,7 +2,6 @@ import fs from 'fs';
 import net from 'net';
 import Stream from 'stream';
 import util from 'util';
-import {URL} from 'url';
 import tempy from 'tempy';
 import test, {ExecutionContext} from 'ava';
 import {JSDOM} from 'jsdom';
@@ -69,6 +68,17 @@ const types = new Map<string, Test>([
 		],
 		typename: TypeName.number
 	}],
+	['bigint', {
+		is: is.bigint,
+		fixtures: [
+			1n,
+			0n,
+			-0n,
+			// eslint-disable-next-line new-cap
+			BigInt('1234')
+		],
+		typename: TypeName.bigint
+	}],
 	['boolean', {
 		is: is.boolean,
 		fixtures: [
@@ -311,6 +321,20 @@ const types = new Map<string, Test>([
 		],
 		typename: TypeName.Float64Array
 	}],
+	['bigint64Array', {
+		is: is.bigint64Array,
+		fixtures: [
+			new BigInt64Array()
+		],
+		typename: TypeName.BigInt64Array
+	}],
+	['biguint64Array', {
+		is: is.biguint64Array,
+		fixtures: [
+			new BigUint64Array()
+		],
+		typename: TypeName.BigUint64Array
+	}],
 	['arrayBuffer', {
 		is: is.arrayBuffer,
 		fixtures: [
diff --git a/tsconfig.json b/tsconfig.json
index c76ee17..8383a7c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,10 +2,10 @@
 	"extends": "@sindresorhus/tsconfig",
 	"compilerOptions": {
 		"outDir": "dist",
-		"target": "es2017",
+		"target": "esnext",
 		"lib": [
 			"es2017",
-			"esnext.asynciterable",
+			"esnext",
 			"dom"
 		]
 	},