diff --git a/local-cli/server/formatBanner.js b/local-cli/server/formatBanner.js
index f54095b0540..9ae49a65e36 100644
--- a/local-cli/server/formatBanner.js
+++ b/local-cli/server/formatBanner.js
@@ -8,7 +8,7 @@
  */
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var wordwrap = require('wordwrap');
 
 var HORIZONTAL_LINE = '\u2500';
@@ -45,7 +45,7 @@ var BOTTOM_RIGHT = '\u2518';
 function formatBanner(message, options) {
   options = options || {};
   _.defaults(options, {
-    chalkFunction: _.identity,
+    chalkFunction: (fn) => fn,
     width: 80,
     marginLeft: 0,
     marginRight: 0,
@@ -71,7 +71,7 @@ function formatBanner(message, options) {
 
   var left = spaces(marginLeft) + VERTICAL_LINE + spaces(paddingLeft);
   var right = spaces(paddingRight) + VERTICAL_LINE + spaces(marginRight);
-  var bodyLines = _.flatten([
+  var bodyLines = _.flattenDeep([
     arrayOf('', paddingTop),
     body.split('\n'),
     arrayOf('', paddingBottom),
@@ -88,7 +88,7 @@ function formatBanner(message, options) {
     spaces(marginRight);
   var bottom = spaces(marginLeft) + BOTTOM_LEFT + horizontalBorderLine +
     BOTTOM_RIGHT + spaces(marginRight);
-  return _.flatten([top, bodyLines, bottom]).join('\n');
+  return _.flattenDeep([top, bodyLines, bottom]).join('\n');
 }
 
 function spaces(number) {
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 6315c5f659a..830a3defa14 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -2167,9 +2167,9 @@
       }
     },
     "flow-bin": {
-      "version": "0.21.0",
-      "from": "flow-bin@>=0.21.0 <0.22.0",
-      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.21.0.tgz",
+      "version": "0.22.1",
+      "from": "flow-bin@latest",
+      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.22.1.tgz",
       "dependencies": {
         "bin-wrapper": {
           "version": "2.1.3",
@@ -2330,7 +2330,7 @@
                         },
                         "is-absolute": {
                           "version": "0.1.7",
-                          "from": "is-absolute@>=0.1.4 <0.2.0",
+                          "from": "is-absolute@>=0.1.7 <0.2.0",
                           "resolved": "https://registry.npmjs.org/is-absolute/-/is-absolute-0.1.7.tgz",
                           "dependencies": {
                             "is-relative": {
@@ -2417,7 +2417,7 @@
                               "dependencies": {
                                 "ansi-regex": {
                                   "version": "0.2.1",
-                                  "from": "ansi-regex@>=0.2.0 <0.3.0",
+                                  "from": "ansi-regex@>=0.2.1 <0.3.0",
                                   "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-0.2.1.tgz"
                                 }
                               }
@@ -2429,7 +2429,7 @@
                               "dependencies": {
                                 "ansi-regex": {
                                   "version": "0.2.1",
-                                  "from": "ansi-regex@>=0.2.0 <0.3.0",
+                                  "from": "ansi-regex@>=0.2.1 <0.3.0",
                                   "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-0.2.1.tgz"
                                 }
                               }
@@ -2508,7 +2508,7 @@
                         },
                         "is-absolute": {
                           "version": "0.1.7",
-                          "from": "is-absolute@>=0.1.4 <0.2.0",
+                          "from": "is-absolute@>=0.1.7 <0.2.0",
                           "resolved": "https://registry.npmjs.org/is-absolute/-/is-absolute-0.1.7.tgz",
                           "dependencies": {
                             "is-relative": {
@@ -2585,7 +2585,7 @@
                         },
                         "is-absolute": {
                           "version": "0.1.7",
-                          "from": "is-absolute@>=0.1.5 <0.2.0",
+                          "from": "is-absolute@>=0.1.7 <0.2.0",
                           "resolved": "https://registry.npmjs.org/is-absolute/-/is-absolute-0.1.7.tgz",
                           "dependencies": {
                             "is-relative": {
@@ -3224,7 +3224,7 @@
                       "dependencies": {
                         "ansi-regex": {
                           "version": "0.2.1",
-                          "from": "ansi-regex@>=0.2.0 <0.3.0",
+                          "from": "ansi-regex@>=0.2.1 <0.3.0",
                           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-0.2.1.tgz"
                         }
                       }
@@ -3236,7 +3236,7 @@
                       "dependencies": {
                         "ansi-regex": {
                           "version": "0.2.1",
-                          "from": "ansi-regex@>=0.2.0 <0.3.0",
+                          "from": "ansi-regex@>=0.2.1 <0.3.0",
                           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-0.2.1.tgz"
                         }
                       }
@@ -3250,7 +3250,7 @@
                 },
                 "lpad-align": {
                   "version": "1.1.0",
-                  "from": "lpad-align@>=1.0.1 <2.0.0",
+                  "from": "lpad-align@>=1.0.0 <2.0.0",
                   "resolved": "https://registry.npmjs.org/lpad-align/-/lpad-align-1.1.0.tgz",
                   "dependencies": {
                     "lpad": {
@@ -3324,9 +3324,9 @@
                   "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.5.2.tgz",
                   "dependencies": {
                     "glob": {
-                      "version": "7.0.0",
+                      "version": "7.0.3",
                       "from": "glob@>=7.0.0 <8.0.0",
-                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.0.tgz"
+                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.3.tgz"
                     }
                   }
                 }
@@ -3539,16 +3539,16 @@
           "from": "boom@^2.8.x",
           "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz"
         },
-        "brace-expansion": {
-          "version": "1.1.1",
-          "from": "brace-expansion@>=1.0.0 <2.0.0",
-          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.1.tgz"
-        },
         "caseless": {
           "version": "0.11.0",
           "from": "caseless@~0.11.0",
           "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
         },
+        "brace-expansion": {
+          "version": "1.1.1",
+          "from": "brace-expansion@>=1.0.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.1.tgz"
+        },
         "chalk": {
           "version": "1.1.1",
           "from": "chalk@^1.1.1",
@@ -3639,16 +3639,16 @@
           "from": "generate-function@^2.0.0",
           "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz"
         },
-        "generate-object-property": {
-          "version": "1.2.0",
-          "from": "generate-object-property@^1.1.0",
-          "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz"
-        },
         "graceful-fs": {
           "version": "4.1.2",
           "from": "graceful-fs@4.1",
           "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.2.tgz"
         },
+        "generate-object-property": {
+          "version": "1.2.0",
+          "from": "generate-object-property@^1.1.0",
+          "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz"
+        },
         "graceful-readlink": {
           "version": "1.0.1",
           "from": "graceful-readlink@>= 1.0.0",
@@ -3684,11 +3684,6 @@
           "from": "http-signature@~0.11.0",
           "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-0.11.0.tgz"
         },
-        "inherits": {
-          "version": "2.0.1",
-          "from": "inherits@*",
-          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
-        },
         "ini": {
           "version": "1.3.4",
           "from": "ini@~1.3.0",
@@ -3699,21 +3694,26 @@
           "from": "is-my-json-valid@^2.12.2",
           "resolved": "https://registry.npmjs.org/is-my-json-valid/-/is-my-json-valid-2.12.2.tgz"
         },
+        "inherits": {
+          "version": "2.0.1",
+          "from": "inherits@*",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+        },
         "is-property": {
           "version": "1.0.2",
           "from": "is-property@^1.0.0",
           "resolved": "https://registry.npmjs.org/is-property/-/is-property-1.0.2.tgz"
         },
-        "isstream": {
-          "version": "0.1.2",
-          "from": "isstream@~0.1.2",
-          "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
-        },
         "isarray": {
           "version": "0.0.1",
           "from": "isarray@0.0.1",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz"
         },
+        "isstream": {
+          "version": "0.1.2",
+          "from": "isstream@~0.1.2",
+          "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
+        },
         "json-stringify-safe": {
           "version": "5.0.1",
           "from": "json-stringify-safe@~5.0.1",
@@ -3729,16 +3729,16 @@
           "from": "lodash._basetostring@^3.0.0",
           "resolved": "https://registry.npmjs.org/lodash._basetostring/-/lodash._basetostring-3.0.1.tgz"
         },
-        "lodash.pad": {
-          "version": "3.1.1",
-          "from": "lodash.pad@^3.0.0",
-          "resolved": "https://registry.npmjs.org/lodash.pad/-/lodash.pad-3.1.1.tgz"
-        },
         "lodash._createpadding": {
           "version": "3.6.1",
           "from": "lodash._createpadding@^3.0.0",
           "resolved": "https://registry.npmjs.org/lodash._createpadding/-/lodash._createpadding-3.6.1.tgz"
         },
+        "lodash.pad": {
+          "version": "3.1.1",
+          "from": "lodash.pad@^3.0.0",
+          "resolved": "https://registry.npmjs.org/lodash.pad/-/lodash.pad-3.1.1.tgz"
+        },
         "lodash.padleft": {
           "version": "3.1.1",
           "from": "lodash.padleft@^3.0.0",
@@ -3774,16 +3774,16 @@
           "from": "mkdirp@>=0.3.0 <0.4.0||>=0.4.0 <0.5.0||>=0.5.0 <0.6.0",
           "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz"
         },
-        "npmlog": {
-          "version": "1.2.1",
-          "from": "npmlog@~1.2.0",
-          "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-1.2.1.tgz"
-        },
         "node-uuid": {
           "version": "1.4.3",
           "from": "node-uuid@~1.4.3",
           "resolved": "https://registry.npmjs.org/node-uuid/-/node-uuid-1.4.3.tgz"
         },
+        "npmlog": {
+          "version": "1.2.1",
+          "from": "npmlog@~1.2.0",
+          "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-1.2.1.tgz"
+        },
         "oauth-sign": {
           "version": "0.8.0",
           "from": "oauth-sign@~0.8.0",
@@ -3839,31 +3839,31 @@
           "from": "string_decoder@~0.10.x",
           "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz"
         },
-        "strip-ansi": {
-          "version": "3.0.0",
-          "from": "strip-ansi@^3.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.0.tgz"
-        },
         "stringstream": {
           "version": "0.0.5",
           "from": "stringstream@~0.0.4",
           "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz"
         },
+        "strip-ansi": {
+          "version": "3.0.0",
+          "from": "strip-ansi@^3.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.0.tgz"
+        },
         "strip-json-comments": {
           "version": "0.1.3",
           "from": "strip-json-comments@0.1.x",
           "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-0.1.3.tgz"
         },
-        "supports-color": {
-          "version": "2.0.0",
-          "from": "supports-color@^2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz"
-        },
         "tar": {
           "version": "2.2.1",
           "from": "tar@~2.2.0",
           "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz"
         },
+        "supports-color": {
+          "version": "2.0.0",
+          "from": "supports-color@^2.0.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz"
+        },
         "tough-cookie": {
           "version": "2.2.0",
           "from": "tough-cookie@~2.2.0",
@@ -5147,7 +5147,7 @@
     },
     "lodash": {
       "version": "3.10.1",
-      "from": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+      "from": "lodash@>=3.10.1 <4.0.0",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz"
     },
     "lodash._baseassign": {
@@ -6349,11 +6349,6 @@
       "from": "uglify-to-browserify@>=1.0.0 <1.1.0",
       "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz"
     },
-    "underscore": {
-      "version": "1.8.3",
-      "from": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz"
-    },
     "user-home": {
       "version": "1.1.1",
       "from": "https://registry.npmjs.org/user-home/-/user-home-1.1.1.tgz",
diff --git a/package.json b/package.json
index 54925a9da9c..9d926ceca5a 100644
--- a/package.json
+++ b/package.json
@@ -151,6 +151,7 @@
     "json-stable-stringify": "^1.0.1",
     "json5": "^0.4.0",
     "jstransform": "^11.0.3",
+    "lodash": "^3.10.1",
     "mkdirp": "^0.5.1",
     "module-deps": "^3.9.1",
     "node-fetch": "^1.3.3",
@@ -169,7 +170,6 @@
     "stacktrace-parser": "^0.1.3",
     "temp": "0.8.3",
     "uglify-js": "^2.6.2",
-    "underscore": "^1.8.3",
     "wordwrap": "^1.0.0",
     "worker-farm": "^1.3.1",
     "ws": "^0.8.0",
diff --git a/packager/react-packager/index.js b/packager/react-packager/index.js
index a392bdf5dd9..dce805c8b95 100644
--- a/packager/react-packager/index.js
+++ b/packager/react-packager/index.js
@@ -14,7 +14,6 @@ require('fast-path').replace();
 useGracefulFs();
 
 var debug = require('debug');
-var omit = require('underscore').omit;
 var Activity = require('./src/Activity');
 
 exports.createServer = createServer;
@@ -118,6 +117,16 @@ function createNonPersistentServer(options) {
   return createServer(options);
 }
 
+function omit(obj, blacklistedKeys) {
+  return Object.keys(obj).reduce((clone, key) => {
+    if (blacklistedKeys.indexOf(key) === -1) {
+      clone[key] = obj[key];
+    }
+
+    return clone;
+  }, {});
+}
+
 // we need to listen on a socket as soon as a server is created, but only once.
 // This file also serves as entry point when spawning a socket server; in that
 // case we need to start the server immediately.
diff --git a/packager/react-packager/src/Bundler/Bundle.js b/packager/react-packager/src/Bundler/Bundle.js
index f424702722e..e53d3c3a9d9 100644
--- a/packager/react-packager/src/Bundler/Bundle.js
+++ b/packager/react-packager/src/Bundler/Bundle.js
@@ -8,7 +8,7 @@
  */
 'use strict';
 
-const _ = require('underscore');
+const _ = require('lodash');
 const base64VLQ = require('./base64-vlq');
 const BundleBase = require('./BundleBase');
 const ModuleTransport = require('../lib/ModuleTransport');
@@ -143,7 +143,7 @@ class Bundle extends BundleBase {
 
       if (options.excludeSource) {
         if (map.sourcesContent && map.sourcesContent.length) {
-          map = _.extend({}, map, {sourcesContent: []});
+          map = Object.assign({}, map, {sourcesContent: []});
         }
       }
 
diff --git a/packager/react-packager/src/Bundler/BundleBase.js b/packager/react-packager/src/Bundler/BundleBase.js
index d3794a433c2..b2f2d251aeb 100644
--- a/packager/react-packager/src/Bundler/BundleBase.js
+++ b/packager/react-packager/src/Bundler/BundleBase.js
@@ -8,7 +8,6 @@
  */
 'use strict';
 
-const _ = require('underscore');
 const ModuleTransport = require('../lib/ModuleTransport');
 
 class BundleBase {
@@ -66,7 +65,7 @@ class BundleBase {
       return this._source;
     }
 
-    this._source = _.pluck(this._modules, 'code').join('\n');
+    this._source = this._modules.map((module) => module.code).join('\n');
     return this._source;
   }
 
diff --git a/packager/react-packager/src/Bundler/HMRBundle.js b/packager/react-packager/src/Bundler/HMRBundle.js
index d9725eea166..90d6e3b3d57 100644
--- a/packager/react-packager/src/Bundler/HMRBundle.js
+++ b/packager/react-packager/src/Bundler/HMRBundle.js
@@ -8,7 +8,6 @@
  */
 'use strict';
 
-const _ = require('underscore');
 const BundleBase = require('./BundleBase');
 const ModuleTransport = require('../lib/ModuleTransport');
 
diff --git a/packager/react-packager/src/Bundler/__tests__/Bundler-test.js b/packager/react-packager/src/Bundler/__tests__/Bundler-test.js
index e108177e279..ac37db89689 100644
--- a/packager/react-packager/src/Bundler/__tests__/Bundler-test.js
+++ b/packager/react-packager/src/Bundler/__tests__/Bundler-test.js
@@ -11,7 +11,7 @@
 jest
   .setMock('worker-farm', () => () => undefined)
   .dontMock('node-haste/node_modules/throat')
-  .dontMock('underscore')
+  .dontMock('lodash')
   .dontMock('../../lib/ModuleTransport')
   .setMock('uglify-js')
   .dontMock('../');
diff --git a/packager/react-packager/src/JSTransformer/__mocks__/underscore.js b/packager/react-packager/src/JSTransformer/__mocks__/lodash.js
similarity index 89%
rename from packager/react-packager/src/JSTransformer/__mocks__/underscore.js
rename to packager/react-packager/src/JSTransformer/__mocks__/lodash.js
index 45754e1a547..ac8224e6042 100644
--- a/packager/react-packager/src/JSTransformer/__mocks__/underscore.js
+++ b/packager/react-packager/src/JSTransformer/__mocks__/lodash.js
@@ -10,4 +10,4 @@
 
 // Bug with Jest because we're going to the node_modules that is a sibling
 // of what jest thinks our root (the dir with the package.json) should be.
-module.exports = require.requireActual('underscore');
+module.exports = require.requireActual('lodash');
diff --git a/packager/react-packager/src/Resolver/__tests__/Resolver-test.js b/packager/react-packager/src/Resolver/__tests__/Resolver-test.js
index df6f609e898..286dc9ebd50 100644
--- a/packager/react-packager/src/Resolver/__tests__/Resolver-test.js
+++ b/packager/react-packager/src/Resolver/__tests__/Resolver-test.js
@@ -8,16 +8,13 @@
  */
 'use strict';
 
-jest.dontMock('../')
-  .dontMock('underscore');
-
+jest.dontMock('../');
 jest.mock('path');
 
 const Promise = require('promise');
 const Resolver = require('../');
 
 const path = require('path');
-const _ = require('underscore');
 
 let DependencyGraph = jest.genMockFn();
 jest.setMock('node-haste', DependencyGraph);
@@ -126,9 +123,9 @@ describe('Resolver', function() {
         .then(function(result) {
           expect(result.mainModuleId).toEqual('index');
           expect(result.dependencies[result.dependencies.length - 1]).toBe(module);
-          expect(_.pluck(DependencyGraph.prototype.createPolyfill.mock.calls, 0)).toEqual([
-            { file: 'polyfills/polyfills.js',
-              id: 'polyfills/polyfills.js',
+          expect(DependencyGraph.prototype.createPolyfill.mock.calls.map((call) => call[0])).toEqual([
+            { id: 'polyfills/polyfills.js',
+              file: 'polyfills/polyfills.js',
               dependencies: []
             },
             { id: 'polyfills/console.js',
diff --git a/packager/react-packager/src/Server/__tests__/Server-test.js b/packager/react-packager/src/Server/__tests__/Server-test.js
index 796f281a402..ce91842e1a7 100644
--- a/packager/react-packager/src/Server/__tests__/Server-test.js
+++ b/packager/react-packager/src/Server/__tests__/Server-test.js
@@ -11,7 +11,7 @@
 jest.setMock('worker-farm', function() { return () => {}; })
     .dontMock('node-haste/node_modules/throat')
     .dontMock('os')
-    .dontMock('underscore')
+    .dontMock('lodash')
     .dontMock('path')
     .dontMock('url')
     .setMock('timers', { setImmediate: (fn) => setTimeout(fn, 0) })
diff --git a/packager/react-packager/src/Server/index.js b/packager/react-packager/src/Server/index.js
index 985516be737..fe49ebbb354 100644
--- a/packager/react-packager/src/Server/index.js
+++ b/packager/react-packager/src/Server/index.js
@@ -15,7 +15,7 @@ const getPlatformExtension = require('node-haste').getPlatformExtension;
 const Bundler = require('../Bundler');
 const Promise = require('promise');
 
-const _ = require('underscore');
+const _ = require('lodash');
 const declareOpts = require('../lib/declareOpts');
 const path = require('path');
 const url = require('url');
@@ -492,7 +492,7 @@ class Server {
       return true;
     }).join('.') + '.js';
 
-    const sourceMapUrlObj = _.clone(urlObj);
+    const sourceMapUrlObj = Object.assign({}, urlObj);
     sourceMapUrlObj.pathname = pathname.replace(/\.bundle$/, '.map');
 
     // try to get the platform from the url
diff --git a/packager/react-packager/src/SocketInterface/__tests__/SocketInterface-test.js b/packager/react-packager/src/SocketInterface/__tests__/SocketInterface-test.js
index b5a7b91605a..4c1aa812c57 100644
--- a/packager/react-packager/src/SocketInterface/__tests__/SocketInterface-test.js
+++ b/packager/react-packager/src/SocketInterface/__tests__/SocketInterface-test.js
@@ -10,7 +10,6 @@
 
 jest.setMock('uglify-js')
     .mock('child_process')
-    .dontMock('underscore')
     .dontMock('../');
 
 var SocketInterface = require('../');
diff --git a/packager/react-packager/src/SocketInterface/index.js b/packager/react-packager/src/SocketInterface/index.js
index 69b52a4f957..f9f3a77b67c 100644
--- a/packager/react-packager/src/SocketInterface/index.js
+++ b/packager/react-packager/src/SocketInterface/index.js
@@ -11,7 +11,6 @@
 const Promise = require('promise');
 const SocketClient = require('./SocketClient');
 const SocketServer = require('./SocketServer');
-const _ = require('underscore');
 const crypto = require('crypto');
 const debug = require('debug')('ReactNativePackager:SocketInterface');
 const fs = require('fs');
@@ -99,7 +98,7 @@ function createServer(resolve, reject, options, sockPath) {
   const log = fs.openSync(logPath, 'a');
 
   // Enable server debugging by default since it's going to a log file.
-  const env = _.clone(process.env);
+  const env = Object.assign({}, process.env);
   env.DEBUG = 'ReactNativePackager:SocketServer';
 
   // We have to go through the main entry point to make sure