diff --git a/lib/config-loader.js b/lib/config-loader.js
index 1d654e1..50fb605 100644
--- a/lib/config-loader.js
+++ b/lib/config-loader.js
@@ -2,7 +2,7 @@ var fs = require('fs');
 var path = require('path');
 var debug = require('debug')('loopback:boot:config-loader');
 var assert = require('assert');
-var _ = require('lodash');
+var lodash = require('lodash');
 var ConfigLoader = exports;
 
 /**
@@ -290,9 +290,11 @@ function mergeArrays(target, config, keyPrefix) {
 }
 
 function mergeArraysDiffLength(target, config) {
-  var newTarget = _.cloneDeep(target, true);
-  //modifies the target array with the union of both the target and config arrays.
-  Array.prototype.splice.apply(target, [0, target.length].concat(_.union(newTarget, config)));
+  var newTarget = lodash.cloneDeep(target, true);
+  //union of both the target and config arrays.
+  var union = lodash.union(newTarget, config);
+  //modifies the target array with the union.
+  Array.prototype.splice.apply(target, [0, target.length].concat(union));
 }
 
 function hasCompatibleType(origValue, newValue) {