diff --git a/lib/penv.js b/lib/penv.js
index 62adb94..8b7bd52 100644
--- a/lib/penv.js
+++ b/lib/penv.js
@@ -6,10 +6,10 @@
  *
  */
 var async  = require('utile').async,
-    utile  = require('utile'),
     eyes   = require('eyes'),
     path   = require('path'),
-    fs     = require('fs');
+    fs     = require('fs'),
+    merge  = require('lodash.merge');
 
 //
 // Penv Module + Defaults
@@ -48,7 +48,7 @@ penv.start = function (next) {
 }
 
 penv.config = function (opts) {
-  if (opts) { utile.mixin(penv, opts) }
+  if (opts) { merge(penv, opts) }
   // add root path to file names
   penv.pkgFile = path.join(penv.root, penv.pkgName);
   penv.envFile = path.join(penv.root, penv.envName);
@@ -86,7 +86,7 @@ penv.getEnvironment = function (next) {
 }
 
 penv.writePackage = function (packages, next) {
-  var merged = utile.mixin({}, packages[0], packages[1]);
+  var merged = merge({}, packages[0], packages[1]);
 
   // Add env variable
   if (penv.env !== "base") {
diff --git a/package.json b/package.json
index 4019469..67498d1 100644
--- a/package.json
+++ b/package.json
@@ -14,9 +14,9 @@
     }
   ],
   "preferGlobal": true,
-  "repository" : {
-    "type" : "git",
-    "url" : "https://github.com/julianduque/penv"
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/julianduque/penv"
   },
   "bin": "./bin/penv",
   "main": "./bin/penv",
@@ -25,8 +25,9 @@
     "test": "make test"
   },
   "dependencies": {
-    "utile": "~0.2.0",
-    "eyes": "~0.1.8"
+    "eyes": "~0.1.8",
+    "lodash.merge": "^4.6.1",
+    "utile": "~0.2.0"
   },
   "devDependencies": {
     "mocha": "~1.9.0",
diff --git a/test/fixtures/package-staging.json b/test/fixtures/package-staging.json
index 49cccf5..abf6294 100644
--- a/test/fixtures/package-staging.json
+++ b/test/fixtures/package-staging.json
@@ -22,7 +22,7 @@
     "node": ">=0.6"
   },
   "dependencies": {
-    "colors": "*",
+    "colors": "2",
     "flatiron": "0.1.x",
     "optimist": "0.2.x",
     "union": "0.1.x",
diff --git a/test/root/app/environments.json b/test/root/app/environments.json
index 855a82e..b32a861 100644
--- a/test/root/app/environments.json
+++ b/test/root/app/environments.json
@@ -4,13 +4,19 @@
     "domains": [
       "myawesomedomain.com",
       "www.myawesomedomain.com"
-    ]
+    ],
+    "dependencies": {
+      "colors": "1"
+    }
   },
   "staging": {
     "subdomain": "staging-awesomeapp",
     "domains": [
       "staging.myawesomedomain.com",
       "www.staging.myawesomedomain.com"
-    ]
+    ],
+    "dependencies": {
+      "colors": "2"
+    }
   }
 }