Use lodash v4.

package.json

@@ -59,6 +59,7 @@
   },
   "homepage": "http://rackt.github.io/redux",
   "dependencies": {
+    "lodash": "^4.1.0",
     "loose-envify": "^1.1.0"
   },
   "devDependencies": {

src/combineReducers.js

@@ -1,5 +1,5 @@
 import { ActionTypes } from './createStore'
-import isPlainObject from './utils/isPlainObject'
+import isPlainObject from 'lodash/isPlainObject'
 import warning from './utils/warning'
 
 function getUndefinedStateErrorMessage(key, action) {

src/createStore.js

@@ -1,4 +1,4 @@
-import isPlainObject from './utils/isPlainObject'
+import isPlainObject from 'lodash/isPlainObject'
 
 /**
  * These are private action types reserved by Redux.

webpack.config.js

@@ -14,10 +14,18 @@ var config = {
     libraryTarget: 'umd'
   },
   plugins : [
+    {
+      apply: function apply(compiler) {
+        compiler.parser.plugin('expression global', function expressionGlobalPlugin() {
+          this.state.module.addVariable('global', "(function() { return this; }()) || Function('return this')()")
+          return false
+        });
+      }
+    },
     new webpack.optimize.OccurenceOrderPlugin(),
     new webpack.DefinePlugin({
       'process.env.NODE_ENV': JSON.stringify(env)
-    })    
+    })
   ]
 };