diff --git a/index.js b/index.js
index 24c9dc0..c04956a 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const URL = require('url').URL;
+
 module.exports = removeTrailingSlashes;
 
 function removeTrailingSlashes(opts) {
diff --git a/test/index.js b/test/index.js
index 4e3bc9a..18d62f0 100644
--- a/test/index.js
+++ b/test/index.js
@@ -4,6 +4,7 @@ const expect = require('expect');
 const Koa = require('koa');
 const request = require('supertest');
 const removeTrailingSlashes = require('../');
+const URL = require('url').URL;
 
 describe('koa-remove-trailing-slashes', () => {
     describe('running in Koa', () => {