diff --git a/libnpupnp-4.1.5.tar.gz b/libnpupnp-4.1.5.tar.gz
deleted file mode 100644
index 59e924d..0000000
--- a/libnpupnp-4.1.5.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/libnpupnp-4.2.1.tar.gz b/libnpupnp-4.2.1.tar.gz
new file mode 100644
index 0000000..bb5aa61
--- /dev/null
+++ b/libnpupnp-4.2.1.tar.gz
@@ -0,0 +1,3 @@
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+oid sha256:e0e59eb2d3d024e827050428e0e7eb228355912a38c85eb30bfeb2f0926eca4c
+size 544987
diff --git a/libnpupnp-4.2.1.tar.gz.asc b/libnpupnp-4.2.1.tar.gz.asc
new file mode 100644
index 0000000..5b3ae39
--- /dev/null
+++ b/libnpupnp-4.2.1.tar.gz.asc
@@ -0,0 +1,16 @@
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diff --git a/libnpupnp.changes b/libnpupnp.changes
index 3f7e753..fc1e79a 100644
--- a/libnpupnp.changes
+++ b/libnpupnp.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Sun Mar 20 09:43:57 UTC 2022 - Andreas Stieger <andreas.stieger@gmx.de>
+
+- update to 4.2.1:
+  * improved compatibility with libupnp 1.14.x
+- add upstream signing key and validate source signature
+
 -------------------------------------------------------------------
 Mon Dec 20 22:09:27 UTC 2021 - Dirk Müller <dmueller@suse.com>
 
diff --git a/libnpupnp.keyring b/libnpupnp.keyring
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diff --git a/libnpupnp.spec b/libnpupnp.spec
index 3d4700b..51654b8 100644
--- a/libnpupnp.spec
+++ b/libnpupnp.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libnpupnp
 #
-# Copyright (c) 2021 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,13 +18,15 @@
 
 %define so_ver  4
 Name:           libnpupnp
-Version:        4.1.5
+Version:        4.2.1
 Release:        0
 Summary:        A C++ base UPnP library, derived from Portable UPnP, a.k.a libupnp
 License:        GPL-2.0-or-later
 Group:          Development/Libraries/C and C++
-URL:            https://www.lesbonscomptes.com/updmpdcli
+URL:            https://www.lesbonscomptes.com/upmpdcli/
 Source0:        https://www.lesbonscomptes.com/upmpdcli/downloads/libnpupnp-%{version}.tar.gz
+Source1:        https://www.lesbonscomptes.com/upmpdcli/downloads/libnpupnp-%{version}.tar.gz.asc
+Source2:        https://www.lesbonscomptes.com/pages/jf-at-dockes.org.pub#/%{name}.keyring
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig
 BuildRequires:  pkgconfig(expat)
@@ -69,6 +71,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %{_libdir}/*.so.*
 
 %files -n libnpupnp-devel
+%license COPYING
 %{_includedir}/*
 %{_libdir}/*.so
 %{_libdir}/pkgconfig/*.pc