-dnl Copyright © 2011-2013, 2020-2023 Nick Bowler
-dnl
-dnl License WTFPL2: Do What The Fuck You Want To Public License, version 2.
-dnl This is free software: you are free to do what the fuck you want to.
-dnl There is NO WARRANTY, to the extent permitted by law.
+AC_COPYRIGHT([Copyright (C) 2011-2013, 2020-2024 Nick Bowler
+License GPLv3+: GNU General Public License version 3 or any later version.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.])