diff --git a/appveyor.yml b/appveyor.yml
index cf9b9339..22d6fdc6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@
 #                               |_| XML parser
 #
 # Copyright (c) 2017      José Gutiérrez de la Concha <jose@zeroc.com>
-# Copyright (c) 2017-2021 Sebastian Pipping <sebastian@pipping.org>
+# Copyright (c) 2017-2022 Sebastian Pipping <sebastian@pipping.org>
 # Copyright (c) 2017      Franek Korta <fkorta@gmail.com>
 # Licensed under the MIT license:
 #
diff --git a/expat/COPYING b/expat/COPYING
index 3c0142e7..ce9e5939 100644
--- a/expat/COPYING
+++ b/expat/COPYING
@@ -1,5 +1,5 @@
 Copyright (c) 1998-2000 Thai Open Source Software Center Ltd and Clark Cooper
-Copyright (c) 2001-2019 Expat maintainers
+Copyright (c) 2001-2022 Expat maintainers
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/expat/lib/xmltok.c b/expat/lib/xmltok.c
index 5a331ed5..2b7012a5 100644
--- a/expat/lib/xmltok.c
+++ b/expat/lib/xmltok.c
@@ -21,6 +21,7 @@
    Copyright (c) 2017      José Gutiérrez de la Concha <jose@zeroc.com>
    Copyright (c) 2019      David Loffredo <loffredo@steptools.com>
    Copyright (c) 2021      Dong-hee Na <donghee.na@python.org>
+   Copyright (c) 2022      Martin Ettl <ettl.martin78@googlemail.com>
    Licensed under the MIT license:
 
    Permission is  hereby granted,  free of charge,  to any  person obtaining
diff --git a/expat/lib/xmltok_impl.c b/expat/lib/xmltok_impl.c
index 9c319a5a..1971d74b 100644
--- a/expat/lib/xmltok_impl.c
+++ b/expat/lib/xmltok_impl.c
@@ -16,6 +16,7 @@
    Copyright (c) 2018      Anton Maklakov <antmak.pub@gmail.com>
    Copyright (c) 2019      David Loffredo <loffredo@steptools.com>
    Copyright (c) 2020      Boris Kolpackov <boris@codesynthesis.com>
+   Copyright (c) 2022      Martin Ettl <ettl.martin78@googlemail.com>
    Licensed under the MIT license:
 
    Permission is  hereby granted,  free of charge,  to any  person obtaining
diff --git a/expat/xmlwf/win32filemap.c b/expat/xmlwf/win32filemap.c
index 51634c42..a0ed75be 100644
--- a/expat/xmlwf/win32filemap.c
+++ b/expat/xmlwf/win32filemap.c
@@ -10,6 +10,7 @@
    Copyright (c) 2000      Clark Cooper <coopercc@users.sourceforge.net>
    Copyright (c) 2002      Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
    Copyright (c) 2016-2017 Sebastian Pipping <sebastian@pipping.org>
+   Copyright (c) 2022      Martin Ettl <ettl.martin78@googlemail.com>
    Licensed under the MIT license:
 
    Permission is  hereby granted,  free of charge,  to any  person obtaining
diff --git a/expat/xmlwf/xmlwf.c b/expat/xmlwf/xmlwf.c
index 3a6b8bad..471f2a20 100644
--- a/expat/xmlwf/xmlwf.c
+++ b/expat/xmlwf/xmlwf.c
@@ -17,6 +17,7 @@
    Copyright (c) 2020      Joe Orton <jorton@redhat.com>
    Copyright (c) 2020      Kleber Tarcísio <klebertarcisio@yahoo.com.br>
    Copyright (c) 2021      Tim Bray <tbray@textuality.com>
+   Copyright (c) 2022      Martin Ettl <ettl.martin78@googlemail.com>
    Licensed under the MIT license:
 
    Permission is  hereby granted,  free of charge,  to any  person obtaining