diff --git a/extdbms/lib/Helpers/CommonHelper.php b/extdbms/lib/Helpers/CommonHelper.php
index 004d003..f333551 100644
--- a/extdbms/lib/Helpers/CommonHelper.php
+++ b/extdbms/lib/Helpers/CommonHelper.php
@@ -66,7 +66,7 @@ abstract class CommonHelper extends Core
     return preg_match($pattern_validation, $domain);
   }
 
-  final public function isIPAddress(string $ip, $type = 'ipv4'): bool
+  final public function isIPAddress(?string $ip = null, $type = 'ipv4'): bool
   {
     switch ($type) {
       case 'ipv4':