diff --git a/src/helper.ts b/src/helper.ts
index 2cf85175..a874bf50 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -13,14 +13,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import Errors = require('./Errors');
-
-import debug = require('debug');
-import fs = require('fs');
-import promisify = require('./promisify');
+import {TimeoutError} from './Errors';
+import * as debug from 'debug';
+import * as fs from 'fs';
 import {CDPSession} from './Connection';
-
-const {TimeoutError} = Errors;
+import {promisify} from 'util';
 
 const openAsync = promisify(fs.open);
 const writeAsync = promisify(fs.write);
diff --git a/src/promisify.ts b/src/promisify.ts
deleted file mode 100644
index e6dc3db7..00000000
--- a/src/promisify.ts
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * Copyright 2020 Google Inc. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-/* This is a poor typed implementation of promisify. It would be much
- * nicer to use util.promisfy from Node but we need it to work in the
- * browser as we bundle via Browserify and Browserify doesn't seem to
- * bundle the util module when it does. The long term goal for our web
- * bundle isn't to use Browserify but something more modern (probably
- * Rollup?) and so rather than delay the TypeScript migration with a big
- * tangent around web bundling we'll use this for now and loop back once
- * src/ is 100% TypeScript.
- *
- * TODO (jacktfranklin@) swap this for util.promisify so we get much
- * better type support from TypeScript
- */
-
-type CallbackFunc = (...args: any[]) => void;
-type PromisifiedFunc = (...args: any[]) => Promise<any>;
-
-function promisify<ResultType extends any>(func: CallbackFunc): PromisifiedFunc {
-  function promisified(...args): Promise<ResultType | ResultType[]> {
-    return new Promise((resolve, reject) => {
-      function callback(err: Error | null, ...result: ResultType[]): void {
-        if (err)
-          return reject(err);
-        if (result.length === 1)
-          return resolve(result[0]);
-        return resolve(result);
-      }
-      func.call(null, ...args, callback);
-    });
-  }
-
-  return promisified;
-}
-
-export = promisify;