diff --git a/debian/copyright b/debian/copyright
index 2b69008..f9e429d 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,27 +1,37 @@
-This package was originally debianized by Roland Bauerschmidt
-<roland@copyleft.de> on Sat,  4 Mar 2000 20:51:28 +0100.
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: pnm2ppa
+Homepage: http://pnm2ppa.sourceforge.net/
+Comment: http://sourceforge.net/projects/showfiles.php?group_id=1322
 
-Homepage: http://pnm2ppa.sourceforge.net/
-Download: http://sourceforge.net/projects/showfiles.php?group_id=1322
-Upstream Authors: A complete list of authors and their contributions can be
-    found in /usr/share/doc/pnm2ppa/CREDITS.
+Files: *
+Copyright: 1998-2000 by the pnm2ppa project
+License: GPL-2+
+Comment: A complete list of authors and their contributions can be
+         found in /usr/share/doc/pnm2ppa/CREDITS.
 
-Copyright © 1998-2000 by the pnm2ppa project
+Files: debian/*
+Copyright: 2000 Roland Bauerschmidt
+           2000 Ionutz Borcoman
+           2001-2007 Chad C. Walstrom
+           2011-2021 Didier Raboud
+           2021 Thorsten Alteholz
+License: GPL-2+
 
-   This package is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This package is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this package; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-   02110-1301, USA
-
-On Debian systems, the complete text of the GNU General
-Public License can be found in `/usr/share/common-licenses/GPL-2'.
+License: GPL-2+
+ This package is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+ .
+ This package is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ .
+ You should have received a copy of the GNU General Public License
+ along with this package; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ 02110-1301, USA
+ .
+ On Debian systems, the complete text of the GNU General
+ Public License can be found in `/usr/share/common-licenses/GPL-2'.