diff --git a/lib/application.js b/lib/application.js
index 810bbc9eb9..fa8870b1ea 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -1,7 +1,7 @@
 'use strict';
 
 var Proto = require('uberproto');
-var _ = require('underscore');
+var _ = require('lodash');
 
 var mixins = require('./mixins');
 var stripSlashes = function (name) {
diff --git a/lib/feathers.js b/lib/feathers.js
index c3d8bbef35..a95f94a064 100644
--- a/lib/feathers.js
+++ b/lib/feathers.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var express = require('express');
 var Proto = require('uberproto');
 var Application = require('./application');
diff --git a/lib/mixins/event.js b/lib/mixins/event.js
index eb1a066ddd..67eef68e00 100644
--- a/lib/mixins/event.js
+++ b/lib/mixins/event.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var rubberduck = require('rubberduck');
 var EventEmitter = require('events').EventEmitter;
 var eventMappings = {
diff --git a/lib/providers/primus.js b/lib/providers/primus.js
index 1db4ade9e6..04aeb19172 100644
--- a/lib/providers/primus.js
+++ b/lib/providers/primus.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var Proto = require('uberproto');
 var Primus = require('primus');
 var Emitter = require('primus-emitter');
diff --git a/lib/providers/rest/index.js b/lib/providers/rest/index.js
index a0042ddbc1..67fa613db2 100644
--- a/lib/providers/rest/index.js
+++ b/lib/providers/rest/index.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var wrappers = require('./wrappers');
 
 module.exports = function (config) {
diff --git a/lib/providers/rest/wrappers.js b/lib/providers/rest/wrappers.js
index d5b7442f3a..29fa57c3f7 100644
--- a/lib/providers/rest/wrappers.js
+++ b/lib/providers/rest/wrappers.js
@@ -1,4 +1,4 @@
-var _ = require('underscore');
+var _ = require('lodash');
 
 /**
  * Return a service callback that sets the data in the given
diff --git a/lib/providers/socketio.js b/lib/providers/socketio.js
index 1b58258dca..74e2368bbd 100644
--- a/lib/providers/socketio.js
+++ b/lib/providers/socketio.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var socketio = require('socket.io');
 var Proto = require('uberproto');
 
diff --git a/package.json b/package.json
index 1890f5fe33..704e7fa818 100644
--- a/package.json
+++ b/package.json
@@ -34,23 +34,23 @@
     "npm": "*"
   },
   "dependencies": {
-    "uberproto": "~ 1.1.0",
-    "express": "~ 3.4.0",
+    "uberproto": "~1.x",
+    "express": "~3.4.0",
     "rubberduck": "~1.x",
-    "underscore": "~1.5.0",
     "socket.io": "~0.9.0",
-    "primus-emitter": "~2.0.5",
-    "primus": "~1.5.1"
+    "primus-emitter": "~3.x",
+    "primus": "~2.x",
+    "lodash": "~2.4.1"
   },
   "devDependencies": {
-    "request": "~2.21.0",
-    "socket.io-client": "~0.9.11",
-    "grunt-cli": "~0.1.7",
-    "grunt": "~0.4.1",
-    "grunt-release": "~0.5.1",
-    "mocha": "~1.11.0",
+    "request": "~2.x",
+    "socket.io-client": "~0.9.0",
+    "grunt-cli": "~0.1.0",
+    "grunt": "~0.4.0",
+    "grunt-release": "~0.5.0",
+    "mocha": "~1.x",
     "grunt-contrib-jshint": "~0.x",
     "grunt-simple-mocha": "~0.4.0",
-    "grunt-jsbeautifier": "~0.2.2"
+    "grunt-jsbeautifier": "~0.2.0"
   }
 }
diff --git a/test/mixins/event.test.js b/test/mixins/event.test.js
index ce74274aea..3c372ba092 100644
--- a/test/mixins/event.test.js
+++ b/test/mixins/event.test.js
@@ -1,7 +1,7 @@
 'use strict';
 
 var assert = require('assert');
-var _ = require('underscore');
+var _ = require('lodash');
 var Proto = require('uberproto');
 var mixinEvent = require('../../lib/mixins/event');
 var EventMixin = mixinEvent.Mixin;
diff --git a/test/providers/service-fixture.js b/test/providers/service-fixture.js
index 49a7628de7..945fcbe5d4 100644
--- a/test/providers/service-fixture.js
+++ b/test/providers/service-fixture.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 var assert = require('assert');
 
 var findAllData = [{