diff --git a/yaclog/changelog.py b/yaclog/changelog.py
index 1f095b9..54e3f5a 100644
--- a/yaclog/changelog.py
+++ b/yaclog/changelog.py
@@ -1,3 +1,19 @@
+#  yaclog: yet another changelog tool
+#  Copyright (c) 2021. Andrew Cassidy
+#
+#  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 datetime
 import os
 import re