diff --git a/wgwadmlibrary/tools.py b/wgwadmlibrary/tools.py
index 1f1f50c..6c3dc8d 100644
--- a/wgwadmlibrary/tools.py
+++ b/wgwadmlibrary/tools.py
@@ -11,7 +11,7 @@ def is_valid_ip_or_hostname(value):
         pass
     
     # Regex to check valid hostname (RFC 1123)
-    hostname_regex = r'^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\.)+[A-Za-z]{2,6}$' 
+    hostname_regex = r'^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\.)+[A-Za-z]{2,18}$' 
     if re.match(hostname_regex, value):
         return True
     
@@ -33,4 +33,4 @@ def list_network_interfaces():
                 interface_name = parts[1].split('@')[0]  # Remove qualquer coisa após '@'
                 interfaces.append(interface_name)
 
-    return interfaces
\ No newline at end of file
+    return interfaces