diff --git a/README.md b/README.md
index 5577a0195..bbd2ef342 100644
--- a/README.md
+++ b/README.md
@@ -104,11 +104,16 @@ License
 
 This software is licensed under [GNU Affero General Public License version 3](http://www.gnu.org/licenses/agpl-3.0.html)
 
-* Copyright (C) 2012 Christophe Vandeplas
+* Copyright (C) 2012-2020 Christophe Vandeplas
 * Copyright (C) 2012 Belgian Defence
 * Copyright (C) 2012 NATO / NCIRC
-* Copyright (C) 2013-2019 Andras Iklody
-* Copyright (C) 2015-2019 CIRCL - Computer Incident Response Center Luxembourg
+* Copyright (C) 2013-2020 Andras Iklody
+* Copyright (C) 2015-2020 CIRCL - Computer Incident Response Center Luxembourg
 * Copyright (C) 2016 Andreas Ziegler
+* Copyright (C) 2018-2020 Sami Mokaddem
+* Copyright (C) 2018-2020 Christian Studer
+* Copyright (C) 2015-2020 Alexandre Dulaunoy
+* Copyright (C) 2018-2020 Steve Clement
+* Copyright (C) 2020 Jakub Onderka
 
 For more information, [the list of authors and contributors](AUTHORS) is available.