diff --git a/helper/type_mapping.js b/helper/type_mapping.js
index 3caea41d..41303583 100644
--- a/helper/type_mapping.js
+++ b/helper/type_mapping.js
@@ -1,5 +1,4 @@
-var extend = require('extend'),
-  _ = require('lodash');
+const _ = require('lodash');
 
 function addStandardTargetsToAliases(standard, aliases) {
   var combined = _.extend({}, aliases);