diff --git a/debian/apertis/copyright b/debian/apertis/copyright
index 16fcbe5555b671ecced02d4035ed3f992675dfb8..1a97b9c012bc38f8f94561159c750aceaf871ffa 100644
--- a/debian/apertis/copyright
+++ b/debian/apertis/copyright
@@ -1,29 +1,41 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 
+Files: *
+Copyright: 1994, 1997, 1998, 2002, 2008, Purdue Research Foundation, West Lafayette, Indiana
+License: UNKNOWN
+
 Files: debian/*
-Copyright: no-info-found
+Copyright: 
+  1996, Dominik Kubla <dominik@debian.org>
+  1997, Michael Meskes <meskes@debian.org>
+  1998-2002, Jim Mintha <jmintha@debian.org>
+  2004-2009, Norbert Tretkowski <nobse@debian.org>
+  2012, Raoul Gunnar Borenius <borenius@dfn.de>
+  2012, Nicholas Bamber <nicholas@periapt.co.uk>
+  2018-2019, Andres Salomon <dilinger@debian.org>
 License: BSD-4-clause
 
-Files: dialects/freebsd/include/*
-Copyright: 1993, Paul Kranenburg
-License: BSD-4-clause
+Files: lib/regex.c
+Copyright: 2000, Purdue Research Foundation, West Lafayette, Indiana
+License: LGPL-2+
 
-Files: dialects/osr/include/*
-Copyright: 1980, 1983, 1988, Regents of the University of California.
-License: BSD-4-clause-UC
+Files: lib/snpf.c
+Copyright: 1994, 2000, Purdue Research Foundation, West Lafayette, Indiana
+License: BSD-4-Clause-UC
 
-Files: dialects/osr/include/sys/*
-Copyright: 1991, 1993, The Regents of the University of California.
-License: BSD-4-clause-UC
+Files: print.c
+Copyright: 1994, 2000, Purdue Research Foundation, West Lafayette, Indiana
+License: BSD-4-Clause-UC
 
-Files: scripts/sort_res.perl5
-Copyright: 2004-2005, - Fabian Frederick <fabian.frederick@gmx.fr>
-License: GPL-2+
+Files: regex.h
+Copyright: 2000, Purdue Research Foundation, West Lafayette, Indiana
+License: LGPL-2+
 
-Files: * 00FAQ NEW/* NEW/ckssh.gz NEW/cktn.gz NEW/irix.zip NEW/lsofAPI.tar.gz NEW/posting.gz NEW/pstat.proto.gz NEW/rns.c.gz NEW/usage.c dialects/darwin/* dialects/darwin/kmem/* support/*
+Files: *
 Copyright: Purdue Research Foundation, West Lafayette, Indiana 47907 2002 - 2011
 License: Purdue
 
-Files: dialects/darwin/libproc/dfile.c dialects/darwin/libproc/dlsof.h dialects/darwin/libproc/dproc.c dialects/darwin/libproc/dfile.c dialects/darwin/libproc/dlsof.h dialects/darwin/libproc/dproc.c dialects/darwin/libproc/dfile.c dialects/darwin/libproc/dlsof.h dialects/darwin/libproc/dproc.c
-Copyright: 2005-2007, Apple Computer, Inc.  All rights reserved.
-License: Purdue
+Files: scripts/sort_res.pl
+Copyright: 2004, 2005, Fabian Frederick <fabian.frederick@gmx.fr>
+License: GPL-2+
+