diff --git a/core/tmtc_client_core.py b/core/tmtc_client_core.py
index d699ca807ad310ffb207e7907cc16e5ddd7b4063..608507f5c9cf43394e8a1f56b05cf1adfd64e059 100755
--- a/core/tmtc_client_core.py
+++ b/core/tmtc_client_core.py
@@ -1,5 +1,4 @@
 #!/usr/bin/python3
-# -*- coding: utf-8 -*-
 """
 @brief  This client was developed by KSat for the SOURCE project to test the on-board software.
 @details
diff --git a/tmtc_client_cli.py b/tmtc_client_cli.py
index a744b5425ddf6f4c549cc140ee4f92c64c4d51f7..48c02fbe3b710e6d782bdb345d16760375c0aab8 100644
--- a/tmtc_client_cli.py
+++ b/tmtc_client_cli.py
@@ -1,3 +1,30 @@
+#!/usr/bin/python3
+"""
+@brief  This client was developed by KSat for the SOURCE project to test the on-board software.
+@details
+This client features multiple sender/receiver modes and has been designed
+to be extensible and easy to use. This clien is based on the PUS standard for the format
+of telecommands and telemetry. It can also send TMTC via different interfaces like the
+serial interface (USB port) or ethernet interface.
+
+@license
+Copyright 2020 KSat e.V. Stuttgart
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+@manual
+Run this file with the -h flag to display options.
+"""
 from core.tmtc_client_core import run_tmtc_client
 
 def main():
diff --git a/tmtc_client_gui.py b/tmtc_client_gui.py
index f389a92c690e7e4f4c9cd36fbba618c9ee208836..60722026def47208fcd2bef2eb3e07607f2ea440 100644
--- a/tmtc_client_gui.py
+++ b/tmtc_client_gui.py
@@ -1,3 +1,29 @@
+#!/usr/bin/python3
+"""
+@brief  This client was developed by KSat for the SOURCE project to test the on-board software.
+@details
+This client features multiple sender/receiver modes and has been designed
+to be extensible and easy to use. This clien is based on the PUS standard for the format
+of telecommands and telemetry. It can also send TMTC via different interfaces like the
+serial interface (USB port) or ethernet interface.
+
+@license
+Copyright 2020 KSat e.V. Stuttgart
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+@manual
+"""
 from core.tmtc_client_core import run_tmtc_client
 
 def main():