diff --git a/cert_expiration_date.py b/cert_expiration_date.py
index bb381bd..c3889dd 100644
--- a/cert_expiration_date.py
+++ b/cert_expiration_date.py
@@ -37,7 +37,7 @@ def check_certificate_expiry(hostname, port=443):
 
 if __name__ == "__main__":
     if len(sys.argv) != 2:
-        print("Uso: python check_certificate.py <hostname>")
+        print("Uso: python cert_expiration_date.py <hostname>")
         sys.exit(1)
     
     hostname = sys.argv[1]