diff --git a/glpk-4.65.tar.gz b/glpk-4.65.tar.gz
deleted file mode 100644
index 1e4385b..0000000
--- a/glpk-4.65.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4281e29b628864dfe48d393a7bedd781e5b475387c20d8b0158f329994721a10
-size 4167110
diff --git a/glpk-4.65.tar.gz.sig b/glpk-4.65.tar.gz.sig
deleted file mode 100644
index 789922c..0000000
Binary files a/glpk-4.65.tar.gz.sig and /dev/null differ
diff --git a/glpk-5.0.tar.gz b/glpk-5.0.tar.gz
new file mode 100644
index 0000000..d257e4c
--- /dev/null
+++ b/glpk-5.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4a1013eebb50f728fc601bdd833b0b2870333c3b3e5a816eeba921d95bec6f15
+size 4132649
diff --git a/glpk-5.0.tar.gz.sig b/glpk-5.0.tar.gz.sig
new file mode 100644
index 0000000..3cc950e
Binary files /dev/null and b/glpk-5.0.tar.gz.sig differ
diff --git a/glpk.changes b/glpk.changes
index d0712bb..8c644ea 100644
--- a/glpk.changes
+++ b/glpk.changes
@@ -1,3 +1,21 @@
+-------------------------------------------------------------------
+Thu Jan 21 18:31:45 UTC 2021 - Luigi Baldoni <aloisio@gmx.com>
+
+- Update to version 5.0
+  * The copyright was transferred to the Free Software Foundation.
+  * To fix some licensing problems the routines in the following
+    files were disabled by replacing with dummy ones that print an
+    error message:
+    + src/api/gridgen.c
+    + src/api/netgen.c
+    + src/api/rmfgen.c
+    + src/misc/qmd.c
+    + src/misc/relax4.c
+    + Note that this change does not affect the main functionality
+      of the package.
+  * Some minor bugs were fixed.
+- Added pkgconfig file
+
 -------------------------------------------------------------------
 Mon Feb  3 15:28:09 UTC 2020 - Martin Pluskal <mpluskal@suse.com>
 
diff --git a/glpk.keyring b/glpk.keyring
index fc6a78d..059ec21 100644
--- a/glpk.keyring
+++ b/glpk.keyring
@@ -1,3 +1,4 @@
+GPG keys of Andrew Makhorin <mao>
 -----BEGIN PGP PUBLIC KEY BLOCK-----
 Version: GnuPG v1.2.2 (MingW32)
 
diff --git a/glpk.spec b/glpk.spec
index abf2414..3131aff 100644
--- a/glpk.spec
+++ b/glpk.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package glpk
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -19,7 +19,7 @@
 %define sover   40
 %define lname   libglpk%{sover}
 Name:           glpk
-Version:        4.65
+Version:        5.0
 Release:        0
 Summary:        GNU Linear Programming Kit
 License:        GPL-3.0-only
@@ -34,6 +34,7 @@ BuildRequires:  gmp-devel
 BuildRequires:  libiodbc-devel
 BuildRequires:  libmariadb-devel
 BuildRequires:  libtool
+BuildRequires:  pkgconfig
 BuildRequires:  texlive
 
 %description
@@ -66,9 +67,7 @@ callable library.
 %package doc
 Summary:        GNU Linear Programming Kit
 Group:          Documentation/Other
-%if 0%{?suse_version} >= 1120 || 0%{?fedora_version}
 BuildArch:      noarch
-%endif
 
 %description doc
 The GLPK package is intended for solving large-scale linear
@@ -101,6 +100,21 @@ export CFLAGS="%{optflags} -fno-strict-aliasing"
 %make_install
 find %{buildroot} -type f -name "*.la" -delete -print
 
+# creates support file for pkg-config
+mkdir -p %{buildroot}/%{_libdir}/pkgconfig
+tee %{buildroot}/%{_libdir}/pkgconfig/%{name}.pc << "EOF"
+prefix=%{_prefix}
+exec_prefix=${prefix}
+libdir=${exec_prefix}/%{_lib}
+includedir=${prefix}/include
+
+Name: %{name}
+Description: GNU Linear Programming Kit
+Version: %{version}
+Libs: -lglpk
+Cflags: -I${includedir}
+EOF
+
 %check
 make %{?_smp_mflags} check
 
@@ -117,6 +131,7 @@ make %{?_smp_mflags} check
 %files devel
 %{_includedir}/*
 %{_libdir}/libglpk.so
+%{_libdir}/pkgconfig/%{name}.pc
 
 %files doc
 %doc ChangeLog NEWS README