diff --git a/python-pysmi.changes b/python-pysmi.changes
index aced58e..c93a426 100644
--- a/python-pysmi.changes
+++ b/python-pysmi.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Sep 30 20:13:20 UTC 2021 - Stefan Schubert <schubi@suse.de>
+
+- Use libalternatives instead of update-alternatives.
+
 -------------------------------------------------------------------
 Mon Oct 14 14:17:08 UTC 2019 - Matej Cepl <mcepl@suse.com>
 
diff --git a/python-pysmi.spec b/python-pysmi.spec
index 1cf8cde..15d1c5e 100644
--- a/python-pysmi.spec
+++ b/python-pysmi.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-pysmi
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# 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
@@ -16,6 +16,12 @@
 #
 
 
+%if 0%{?suse_version} > 1500
+%bcond_without libalternatives
+%else
+%bcond_with libalternatives
+%endif
+
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-pysmi
 Version:        0.3.4
@@ -26,10 +32,14 @@ URL:            http://pysmi.sourceforge.net/
 Source:         https://files.pythonhosted.org/packages/source/p/pysmi/pysmi-%{version}.tar.gz
 BuildRequires:  %{python_module ply}
 BuildRequires:  fdupes
-BuildRequires:  python-rpm-macros
+BuildRequires:  python-rpm-macros >= 20210929
 Requires:       python-ply
+%if %{with libalternatives}
+Requires:       alts
+%else
 Requires(post): update-alternatives
 Requires(postun): update-alternatives
+%endif
 BuildArch:      noarch
 %python_subpackages
 
@@ -53,6 +63,10 @@ mv %{buildroot}%{_bindir}/mibcopy.py %{buildroot}%{_bindir}/mibcopy
 %python_clone -a %{buildroot}%{_bindir}/mibcopy
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
+%pre
+# If libalternatives is used: Removing old update-alternatives entries.
+%python_libalternatives_reset_alternative mibdump
+
 %post
 %python_install_alternative mibdump