diff --git a/build-aux/m4/buildsys.m4 b/build-aux/m4/buildsys.m4
index 4b99206..8389a83 100644
--- a/build-aux/m4/buildsys.m4
+++ b/build-aux/m4/buildsys.m4
@@ -1,6 +1,6 @@
 dnl
 dnl Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017,
-dnl               2018, 2020, 2021, 2022, 2023, 2024
+dnl               2018, 2020, 2021, 2022, 2023, 2024, 2025
 dnl   Jonathan Schleifer <js@nil.im>
 dnl
 dnl https://fl.nil.im/buildsys
diff --git a/buildsys.mk.in b/buildsys.mk.in
index 2fe8546..1cc634d 100644
--- a/buildsys.mk.in
+++ b/buildsys.mk.in
@@ -1,6 +1,6 @@
 #
 #  Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
-#                2017, 2018, 2020, 2021, 2022, 2023, 2024
+#                2017, 2018, 2020, 2021, 2022, 2023, 2024, 2025
 #    Jonathan Schleifer <js@nil.im>
 #
 #  https://fl.nil.im/buildsys