diff --git a/config/webpack.common.js b/config/webpack.common.js
index 84138ad4..09eed78f 100644
--- a/config/webpack.common.js
+++ b/config/webpack.common.js
@@ -1,5 +1,4 @@
 const webpack = require('webpack');
-const path = require('path');
 const helpers = require('./helpers');
 
 /*
diff --git a/config/webpack.dev.js b/config/webpack.dev.js
index 471358ab..29745e76 100644
--- a/config/webpack.dev.js
+++ b/config/webpack.dev.js
@@ -1,5 +1,4 @@
 const helpers = require('./helpers');
-const path = require('path');
 const webpackMerge = require('webpack-merge'); // used to merge webpack configs
 const webpackMergeDll = webpackMerge.strategy({plugins: 'replace'});
 const commonConfig = require('./webpack.common.js'); // the settings that are common to prod and dev
@@ -42,7 +41,7 @@ module.exports = function (options) {
      * See: http://webpack.github.io/docs/configuration.html#devtool
      * See: https://github.com/webpack/docs/wiki/build-performance#sourcemaps
      */
-    devtool: 'cheap-module-source-map',
+    devtool: 'eval-source-map',
 
     /**
      * Options affecting the output of the compilation.
@@ -72,7 +71,7 @@ module.exports = function (options) {
        *
        * See: http://webpack.github.io/docs/configuration.html#output-sourcemapfilename
        */
-      sourceMapFilename: '[name].map',
+      sourceMapFilename: '[file].map',
 
       /** The filename of non-entry chunks as relative path
        * inside the output.path directory.
@@ -135,7 +134,7 @@ module.exports = function (options) {
         },
         dllDir: helpers.root('dll'),
         webpackConfig: webpackMergeDll(commonConfig({env: ENV}), {
-          devtool: 'cheap-module-source-map',
+          devtool: 'eval-source-map',
           plugins: []
         })
       }),
diff --git a/config/webpack.prod.js b/config/webpack.prod.js
index 4e21d7b4..727744a0 100644
--- a/config/webpack.prod.js
+++ b/config/webpack.prod.js
@@ -5,7 +5,6 @@ const commonConfig = require('./webpack.common.js'); // the settings that are co
 /**
  * Webpack Plugins
  */
-const DedupePlugin = require('webpack/lib/optimize/DedupePlugin');
 const DefinePlugin = require('webpack/lib/DefinePlugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const IgnorePlugin = require('webpack/lib/IgnorePlugin');