diff --git a/documentation/arduino.tex b/documentation/arduino.tex
index 816564a..0ddf92f 100644
--- a/documentation/arduino.tex
+++ b/documentation/arduino.tex
@@ -1,3 +1,22 @@
+% Copyright (c):
+%
+% Philipp Matthias Schäfer (philipp.matthias.schaefer@posteo.de), 2020
+%
+% This file is part of the KrautStatus' Arduino code.
+%
+% The Clean CommonMark library 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.
+%
+% The Clean CommonMark library 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 the Clean CommonMark library. If not, see
+% <https://www.gnu.org/licenses/>.
 \documentclass[border=1mm]{standalone}
 
 \usepackage{tikz}
diff --git a/scripts/test_udp_api.py b/scripts/test_udp_api.py
index ada9d0c..f0cc5a6 100755
--- a/scripts/test_udp_api.py
+++ b/scripts/test_udp_api.py
@@ -1,4 +1,23 @@
 #!/usr/bin/env python3
+# Copyright (c):
+#
+# Philipp Matthias Schäfer (philipp.matthias.schaefer@posteo.de), 2020
+#
+# This file is part of the KrautStatus' Arduino code.
+#
+# The Clean CommonMark library 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.
+#
+# The Clean CommonMark library 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 the Clean CommonMark library. If not, see
+# <https://www.gnu.org/licenses/>.
 """
 Test KrautStatus's UDP API for a given IP and (optionally) port.
 """