diff --git a/src/tool.js b/src/tool.js
index 0997882..e638053 100644
--- a/src/tool.js
+++ b/src/tool.js
@@ -1,8 +1,8 @@
 exports.genURL = (urlLength) => {
-  var urlString = "";
+  var urlString;
   const sourceLetters = "ABCDEFGHJKMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz23456789";
 
-  for(var genLoopIndex = 0; genLoopIndex < 50; genLoopIndex++){
+  for(var genLoopIndex = 0; genLoopIndex < 150; genLoopIndex++){
 
     // Add a random letter to the urlString
     urlString += sourceLetters.charAt(Math.random() * (sourceLetters.length - 1))