diff --git a/index.html b/index.html
index b67070af..90ff4937 100644
--- a/index.html
+++ b/index.html
@@ -161,16 +161,10 @@
 
 const urlParams = new URLSearchParams(window.location.search);
 
-let maxIP = urlParams.get('max')
+let maxIP = ~~urlParams.get('max')
 let testNo = 0;
 let validIPs = [];
 
-if (maxIP === null) {
-  maxIP = 20
-} else {
-  maxIP = parseInt(maxIP);
-}
-
 var ips;
 var cidr;
 let numberOfWorkingIPs = 0;