diff --git a/check_dns_tls.py b/check_dns_tls.py
index e7d0e65..5bd997b 100755
--- a/check_dns_tls.py
+++ b/check_dns_tls.py
@@ -16,8 +16,8 @@ def resolve_dns_server_ip(server):
 
 def main():
     parser = argparse.ArgumentParser(description='Check DNS-over-TLS connectivity and response time')
-    parser.add_argument('-c', '--critical', type=float, default=0.5, help='Critical threshold for response time in seconds (default: 0.5)')
-    parser.add_argument('-w', '--warning', type=float, default=0.3, help='Warning threshold for response time in seconds (default: 0.3)')
+    parser.add_argument('-c', '--critical', type=float, default=500, help='Critical threshold for response time in milliseconds (default: 500)')
+    parser.add_argument('-w', '--warning', type=float, default=300, help='Warning threshold for response time in milliseconds (default: 300)')
     parser.add_argument('-d', '--domain', type=str, default='google.com', help='Domain to resolve (default: google.com)')
     parser.add_argument('-s', '--server', type=str, required=True, help='DNS server address')
     parser.add_argument('-p', '--port', type=int, default=853, help='Port to use for DNS-over-TLS (default: 853)')
@@ -54,12 +54,12 @@ def main():
         sys.exit(2)
 
     resolved_ips = [str(rr.address) for rr in response.answer[0] if rr.rdtype == dns.rdatatype.A]
-    perfdata = f'Resolved IPs: {", ".join(resolved_ips)} | response_time={response_time_ms}ms;{int(args.warning * 1000)};{int(args.critical * 1000)};0;'
+    perfdata = f'Resolved IPs: {", ".join(resolved_ips)} | response_time={response_time_ms}ms;{args.warning};{args.critical};0;'
 
-    if response_time >= args.critical:
+    if response_time_ms >= args.critical:
         print(f'CRITICAL - DNS-over-TLS response time: {response_time:.2f} sec.')
         sys.exit(2)
-    elif response_time >= args.warning:
+    elif response_time_ms >= args.warning:
         print(f'WARNING - DNS-over-TLS response time: {response_time:.2f} sec.')
         sys.exit(1)
     else: