diff --git a/LICENSE b/LICENSE
index 1c27704..fffca6e 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2015-2020 Matthias Geier
+Copyright (c) 2015-2021 Matthias Geier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/doc/conf.py b/doc/conf.py
index b8bfaa0..0c35fe9 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -42,7 +42,6 @@
 
 authors = 'Matthias Geier'
 project = 'python-sounddevice'
-copyright = '2020, ' + authors
 
 try:
     release = check_output(['git', 'describe', '--tags', '--always'])
diff --git a/sounddevice.py b/sounddevice.py
index 65ac26c..887f277 100644
--- a/sounddevice.py
+++ b/sounddevice.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2015-2020 Matthias Geier
+# Copyright (c) 2015-2021 Matthias Geier
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal