diff --git a/src/alexandria3k/data_sources/pubmed.py b/src/alexandria3k/data_sources/pubmed.py
index 52818ab1..188f5869 100644
--- a/src/alexandria3k/data_sources/pubmed.py
+++ b/src/alexandria3k/data_sources/pubmed.py
@@ -1,6 +1,6 @@
 #
 # Alexandria3k Pubmed bibliographic metadata processing
-# Copyright (C) 2022-2023  Diomidis Spinellis
+# Copyright (C) 2023 Bas Verlooy
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/src/alexandria3k/file_pubmed_cache.py b/src/alexandria3k/file_pubmed_cache.py
index 3edc492d..03bd3427 100644
--- a/src/alexandria3k/file_pubmed_cache.py
+++ b/src/alexandria3k/file_pubmed_cache.py
@@ -1,6 +1,6 @@
 #
 # Alexandria2k Crossref bibliographic metadata processing
-# Copyright (C) 2022  Diomidis Spinellis
+# Copyright (C) 2023 Bas Verlooy
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/tests/data_sources/test_pubmed.py b/tests/data_sources/test_pubmed.py
index 151ff067..520504b9 100644
--- a/tests/data_sources/test_pubmed.py
+++ b/tests/data_sources/test_pubmed.py
@@ -1,6 +1,6 @@
 #
 # Alexandria3k Pubmed bibliographic metadata processing
-# Copyright (C) 2022  Diomidis Spinellis
+# Copyright (C) 2023 Bas Verlooy
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
 # This program is free software: you can redistribute it and/or modify