diff --git a/src/main/index.js b/src/main/index.js
index e9d4a36..700f045 100644
--- a/src/main/index.js
+++ b/src/main/index.js
@@ -1,37 +1,31 @@
 'use strict'
 
 import { app, BrowserWindow } from 'electron'
-import { path } from 'path'
+import * as path from 'path'
+import { format as formatUrl } from 'url'
 
 const isDevelopment = process.env.NODE_ENV !== 'production'
 
-// Global reference to mainWindow
-// Necessary to prevent win from being garbage collected
+// global reference to mainWindow (necessary to prevent window from being garbage collected)
 let mainWindow
 
 function createMainWindow() {
-  // Construct new BrowserWindow
   const window = new BrowserWindow()
 
-  // Path to index file in production environment
-  const productionIndexPath = url.format({
-    pathname: path.join(__dirname, 'index.html'),
-    protocol: 'file',
-    slashes: true
-  })
-
-  // Set url for `win`
-    // points to `webpack-dev-server` in development
-    // points to `index.html` in production
-  const url = isDevelopment
-    ? `http://localhost:${process.env.ELECTRON_WEBPACK_WDS_PORT}`
-    : productionIndexPath
-
   if (isDevelopment) {
     window.webContents.openDevTools()
   }
 
-  window.loadURL(url)
+  if (isDevelopment) {
+    window.loadURL(`http://localhost:${process.env.ELECTRON_WEBPACK_WDS_PORT}`)
+  }
+  else {
+    window.loadURL(formatUrl({
+      pathname: path.join(__dirname, 'index.html'),
+      protocol: 'file',
+      slashes: true
+    }))
+  }
 
   window.on('closed', () => {
     mainWindow = null
@@ -47,20 +41,22 @@ function createMainWindow() {
   return window
 }
 
-// Quit application when all windows are closed
+// quit application when all windows are closed
 app.on('window-all-closed', () => {
-  // On macOS it is common for applications to stay open
-  // until the user explicitly quits
-  if (process.platform !== 'darwin') app.quit()
+  // on macOS it is common for applications to stay open until the user explicitly quits
+  if (process.platform !== 'darwin') {
+    app.quit()
+  }
 })
 
 app.on('activate', () => {
-  // On macOS it is common to re-create a window
-  // even after all windows have been closed
-  if (mainWindow === null) mainWindow = createMainWindow()
+  // on macOS it is common to re-create a window even after all windows have been closed
+  if (mainWindow === null) {
+    mainWindow = createMainWindow()
+  }
 })
 
-// Create main BrowserWindow when electron is ready
+// create main BrowserWindow when electron is ready
 app.on('ready', () => {
   mainWindow = createMainWindow()
 })