diff --git a/POTATO_constantF.py b/POTATO_constantF.py
index 9d17b2f..3c64365 100644
--- a/POTATO_constantF.py
+++ b/POTATO_constantF.py
@@ -1,3 +1,4 @@
+"""Copyright 2021 Helmholtz-Zentrum für Infektionsforschung GmbH"""
 
 from tkinter import filedialog
 import matplotlib.pyplot as plt