diff --git a/config/webpack.common.js b/config/webpack.common.js
index 972fc49..b111f6c 100644
--- a/config/webpack.common.js
+++ b/config/webpack.common.js
@@ -1,9 +1,9 @@
 // vim: set tw=80 ts=2 sw=2 sts=2:
 
-var webpack = require('webpack');
-var HtmlWebpackPlugin = require('html-webpack-plugin');
-var ExtractTextPlugin = require('extract-text-webpack-plugin');
-var helpers = require('./helpers');
+const webpack = require('webpack');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+const ExtractTextPlugin = require('extract-text-webpack-plugin');
+const helpers = require('./helpers');
 
 module.exports = {
   entry: {
diff --git a/config/webpack.dev.js b/config/webpack.dev.js
index c723c66..584c41e 100644
--- a/config/webpack.dev.js
+++ b/config/webpack.dev.js
@@ -1,9 +1,9 @@
 // vim: set tw=80 ts=2 sw=2 sts=2:
 
-var webpackMerge = require('webpack-merge');
-var ExtractTextPlugin = require('extract-text-webpack-plugin');
-var commonConfig = require('./webpack.common.js');
-var helpers = require('./helpers');
+const webpackMerge = require('webpack-merge');
+const ExtractTextPlugin = require('extract-text-webpack-plugin');
+const commonConfig = require('./webpack.common.js');
+const helpers = require('./helpers');
 
 module.exports = webpackMerge(commonConfig, {
   devtool: 'cheap-module-eval-source-map',
diff --git a/config/webpack.prod.js b/config/webpack.prod.js
index d5a0395..c13f28d 100644
--- a/config/webpack.prod.js
+++ b/config/webpack.prod.js
@@ -1,9 +1,9 @@
 /* jshint esversion: 6 */
-var webpack = require('webpack');
-var webpackMerge = require('webpack-merge');
-var ExtractTextPlugin = require('extract-text-webpack-plugin');
-var commonConfig = require('./webpack.common.js');
-var helpers = require('./helpers');
+const webpack = require('webpack');
+const webpackMerge = require('webpack-merge');
+const ExtractTextPlugin = require('extract-text-webpack-plugin');
+const commonConfig = require('./webpack.common.js');
+const helpers = require('./helpers');
 
 const ENV = process.env.NODE_ENV = process.env.ENV = 'production';