diff --git a/lib/roles/app/middleware/webpack.js b/lib/roles/app/middleware/webpack.js
index 215468e4..c489ed71 100644
--- a/lib/roles/app/middleware/webpack.js
+++ b/lib/roles/app/middleware/webpack.js
@@ -5,9 +5,7 @@ var webpack = require('webpack')
 var mime = require('mime')
 var Promise = require('bluebird')
 var _ = require('lodash')
-var MemoryOutputFileSystem = require('webpack/lib/MemoryOutputFileSystem')
-var MemoryInputFileSystem =
-  require('webpack/node_modules/enhanced-resolve/lib/MemoryInputFileSystem')
+var MemoryFileSystem = require('webpack/node_modules/memory-fs')
 
 var logger = require('../../../util/logger')
 var lifecycle = require('../../../util/lifecycle')
@@ -20,11 +18,8 @@ module.exports = function(options) {
   var log = logger.createLogger('middleware:webpack')
   options = _.defaults(options || {}, globalOptions)
 
-  var storage = Object.create(null)
-  var fs = new MemoryInputFileSystem(storage)
-
   var compiler = webpack(options)
-  compiler.outputFileSystem = new MemoryOutputFileSystem(storage)
+  var fs = compiler.outputFileSystem = new MemoryFileSystem()
 
   var valid = false
   var queue = []