diff --git a/burn-cvcerts.py b/burn-cvcerts.py
index 8359e03..810f8af 100644
--- a/burn-cvcerts.py
+++ b/burn-cvcerts.py
@@ -1,4 +1,24 @@
-#! /usr/bin/env python3
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+/*
+ * This file is part of the Pico HSM distribution (https://github.com/polhenarejos/pico-hsm).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+"""
+
 from smartcard.CardType import AnyCardType
 from smartcard.CardRequest import CardRequest
 from smartcard.Exceptions import CardRequestTimeoutException