diff --git a/node_cli/core/nftables.py b/node_cli/core/nftables.py
index b9b05911..de411ddb 100644
--- a/node_cli/core/nftables.py
+++ b/node_cli/core/nftables.py
@@ -1,3 +1,22 @@
+#   -*- coding: utf-8 -*-
+#
+#   This file is part of node-cli
+#
+#   Copyright (C) 2019 SKALE Labs
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import json
 import logging
 import os