diff --git a/src/browser/components/UpdaterPage.jsx b/src/browser/components/UpdaterPage.jsx
index 7fa356e9..3b9be435 100644
--- a/src/browser/components/UpdaterPage.jsx
+++ b/src/browser/components/UpdaterPage.jsx
@@ -1,24 +1,31 @@
-const React = require('react');
-const propTypes = require('prop-types');
-const {Button, Navbar, ProgressBar} = require('react-bootstrap');
+// Copyright (c) 2015-2016 Yuya Ochiai
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+import React from 'react';
+import propTypes from 'prop-types';
+import {Button, Navbar, ProgressBar} from 'react-bootstrap';
 
 function InstallButton(props) {
   if (props.notifyOnly) {
-    return (<Button
-      bsStyle='primary'
-      onClick={props.onClickDownload}
-            >{'Download Update'}</Button>);
+    return (
+      <Button
+        bsStyle='primary'
+        onClick={props.onClickDownload}
+      >{'Download Update'}</Button>
+    );
   }
-  return (<Button
-    bsStyle='primary'
-    onClick={props.onClickInstall}
-          >{'Install Update'}</Button>);
+  return (
+    <Button
+      bsStyle='primary'
+      onClick={props.onClickInstall}
+    >{'Install Update'}</Button>
+  );
 }
 
 InstallButton.propTypes = {
   notifyOnly: propTypes.bool.isRequired,
   onClickInstall: propTypes.func.isRequired,
-  onClickDownload: propTypes.func.isRequired
+  onClickDownload: propTypes.func.isRequired,
 };
 
 function UpdaterPage(props) {
@@ -84,7 +91,7 @@ UpdaterPage.propTypes = {
   onClickDownload: propTypes.func.isRequired,
   onClickReleaseNotes: propTypes.func.isRequired,
   onClickRemind: propTypes.func.isRequired,
-  onClickSkip: propTypes.func.isRequired
+  onClickSkip: propTypes.func.isRequired,
 };
 
-module.exports = UpdaterPage;
+export default UpdaterPage;
diff --git a/src/browser/updater.jsx b/src/browser/updater.jsx
index a6a1d74d..a10b6d66 100644
--- a/src/browser/updater.jsx
+++ b/src/browser/updater.jsx
@@ -1,9 +1,14 @@
-const React = require('react');
-const ReactDOM = require('react-dom');
-const propTypes = require('prop-types');
-const {ipcRenderer} = require('electron');
-const url = require('url');
-const UpdaterPage = require('./components/UpdaterPage.jsx');
+// Copyright (c) 2015-2016 Yuya Ochiai
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+import url from 'url';
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+import propTypes from 'prop-types';
+import {ipcRenderer} from 'electron';
+
+import UpdaterPage from './components/UpdaterPage.jsx';
 
 const thisURL = url.parse(location.href, true);
 const notifyOnly = thisURL.query.notifyOnly === 'true';
@@ -17,12 +22,12 @@ class UpdaterPageContainer extends React.Component {
   componentDidMount() {
     ipcRenderer.on('start-download', () => {
       this.setState({
-        isDownloading: true
+        isDownloading: true,
       });
     });
     ipcRenderer.on('progress', (event, progress) => {
       this.setState({
-        progress
+        progress,
       });
     });
   }
@@ -54,7 +59,7 @@ class UpdaterPageContainer extends React.Component {
 
 UpdaterPageContainer.propTypes = {
   notifyOnly: propTypes.bool,
-  initialState: propTypes.object
+  initialState: propTypes.object,
 };
 
 ReactDOM.render(
diff --git a/src/main.js b/src/main.js
index d943b2c8..36246d41 100644
--- a/src/main.js
+++ b/src/main.js
@@ -25,7 +25,7 @@ import {parse as parseArgv} from 'yargs';
 import {protocols} from '../electron-builder.json';
 
 import CriticalErrorHandler from './main/CriticalErrorHandler';
-import {upgradeAutoLaunch} from './main/autoLaunch';
+import upgradeAutoLaunch from './main/autoLaunch';
 import buildConfig from './common/config/buildConfig';
 
 const criticalErrorHandler = new CriticalErrorHandler();
diff --git a/src/main/autoLaunch.js b/src/main/autoLaunch.js
index 85fd0e92..72eac789 100644
--- a/src/main/autoLaunch.js
+++ b/src/main/autoLaunch.js
@@ -1,4 +1,7 @@
-const AutoLaunch = require('auto-launch');
+// Copyright (c) 2015-2016 Yuya Ochiai
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+import AutoLaunch from 'auto-launch';
 
 async function upgradeAutoLaunch() {
   if (process.platform === 'darwin') {
@@ -6,7 +9,7 @@ async function upgradeAutoLaunch() {
   }
   const appLauncher = new AutoLaunch({
     name: 'Mattermost',
-    isHidden: true
+    isHidden: true,
   });
   const enabled = await appLauncher.isEnabled();
   if (enabled) {
@@ -14,4 +17,4 @@ async function upgradeAutoLaunch() {
   }
 }
 
-module.exports = {upgradeAutoLaunch};
+export default upgradeAutoLaunch;
diff --git a/src/main/autoUpdater.js b/src/main/autoUpdater.js
index 63f57c54..035d268a 100644
--- a/src/main/autoUpdater.js
+++ b/src/main/autoUpdater.js
@@ -1,8 +1,14 @@
-const {app, BrowserWindow, dialog, ipcMain, shell} = require('electron');
-const fs = require('fs');
-const path = require('path');
-const {autoUpdater} = require('electron-updater');
-const semver = require('semver');
+// Copyright (c) 2015-2016 Yuya Ochiai
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import fs from 'fs';
+import path from 'path';
+
+import {app, BrowserWindow, dialog, ipcMain, shell} from 'electron';
+
+import {autoUpdater} from 'electron-updater';
+import semver from 'semver';
 
 const INTERVAL_48_HOURS_IN_MS = 172800000; // 48 * 60 * 60 * 1000 [ms]
 
@@ -28,7 +34,7 @@ function createUpdaterModal(parentWindow, options) {
     width: windowWidth,
     height: windowHeight,
     resizable: false,
-    autoHideMenuBar: true
+    autoHideMenuBar: true,
   };
   if (process.platform === 'linux') {
     windowOptions.icon = options.linuxAppIcon;
@@ -87,7 +93,7 @@ function initialize(appState, mainWindow, notifyOnly = false) {
     if (isUpdateApplicable(new Date(), appState.skippedVersion, info)) {
       updaterModal = createUpdaterModal(mainWindow, {
         linuxAppIcon: path.join(assetsDir, 'appicon.png'),
-        notifyOnly
+        notifyOnly,
       });
       updaterModal.on('closed', () => {
         updaterModal = null;
@@ -123,7 +129,7 @@ function initialize(appState, mainWindow, notifyOnly = false) {
         type: 'info',
         buttons: ['Close'],
         title: 'Your Desktop App is up to date',
-        message: 'You have the latest version of the Mattermost Desktop App.'
+        message: 'You have the latest version of the Mattermost Desktop App.',
       }, () => {}); // eslint-disable-line no-empty-function
     }
     setTimeout(() => {
@@ -169,10 +175,10 @@ function loadConfig(file) {
   return new AutoUpdaterConfig(file);
 }
 
-module.exports = {
+export default {
   INTERVAL_48_HOURS_IN_MS,
   checkForUpdates,
   shouldCheckForUpdatesOnStart,
   initialize,
-  loadConfig
+  loadConfig,
 };