diff --git a/lib/url-builder/index.js b/lib/url-builder/index.js
index 171bb7cc9b..5f69f559c9 100644
--- a/lib/url-builder/index.js
+++ b/lib/url-builder/index.js
@@ -1,15 +1,20 @@
-var urls = {}
+const urls = {}
 
-module.exports.register = function urlBuilderRegister (label, path) { urls[label] = path }
+module.exports.register = function urlBuilderRegister (label, path) {
+  urls[label] = path
+}
 
 module.exports.for = function urlBuilderFor (label, params) {
   var url = urls[label]
+
   if (!url) throw new Error('Unknown label for urlBuilder ' + label)
+
   if (params) {
     Object.keys(params).forEach(function (param) {
       var pExp = new RegExp(':' + param, 'g')
       url = url.replace(pExp, params[param])
     })
   }
+
   return url
 }