diff --git a/Gruntfile.js b/Gruntfile.js
index ee3632fd..d509ab91 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -44,7 +44,7 @@ module.exports = function (grunt) {
         this.requires("connect");
 
         var WebTestRunner = require("./").WebTestRunner,
-            _ = require("underscore"),
+            _ = require("lodash"),
             done = this.async(),
             grid = grunt.config.get("seleniumGrid") || {
                 host: "127.0.0.1",
diff --git a/config.json b/config.json
index 83fe0d59..e2bb1ccc 100644
--- a/config.json
+++ b/config.json
@@ -44,7 +44,7 @@
         "flow": "js/lib/flow",
         "Query": "js/lib/query/query",
         "inherit": "js/lib/inherit",
-        "underscore": "js/lib/underscore",
+        "underscore": "js/lib/lodash",
         "moment": "js/lib/moment",
         "JSON": "js/lib/json2.js",
         "RestConditionParser": "srv/lib/RestConditionParser"
diff --git a/lib/TestRunner.js b/lib/TestRunner.js
index 83faa8a4..281cebb7 100644
--- a/lib/TestRunner.js
+++ b/lib/TestRunner.js
@@ -1,7 +1,7 @@
 var requirejs = require('requirejs'),
     inherit = require('inherit.js').inherit,
     path = require('path'),
-    _ = require('underscore'),
+    _ = require('lodash'),
     flow = require('flow.js').flow,
     findXamlClasses = require('./findXamlClasses'),
 
diff --git a/lib/WebTestRunner.js b/lib/WebTestRunner.js
index 2778bd1b..e484d33e 100644
--- a/lib/WebTestRunner.js
+++ b/lib/WebTestRunner.js
@@ -1,6 +1,6 @@
 module.exports = function(options, moduleCallback) {
 
-    var _ = require("underscore"),
+    var _ = require("lodash"),
         fs = require("fs"),
         path = require("path"),
         Mocha = require("mocha"),
diff --git a/package.json b/package.json
index 4795ad82..fb4d345f 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,8 @@
     "colors": "*",
     "xmlhttprequest": "latest",
     "xmldom": "0.1.15",
-    "esprima": "latest"
+    "esprima": "latest",
+    "lodash": "~2.4.1"
   },
   "optionalDependencies": {},
   "devDependencies": {