diff --git a/python-exrex.changes b/python-exrex.changes
index 012bde3..52c4edc 100644
--- a/python-exrex.changes
+++ b/python-exrex.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue May 26 06:34:10 UTC 2020 - Petr Gajdos <pgajdos@suse.com>
+
+- %python3_only -> %python_alternative
+
 -------------------------------------------------------------------
 Mon Jun  3 10:59:25 UTC 2019 - pgajdos@suse.com
 
diff --git a/python-exrex.spec b/python-exrex.spec
index 3b833ea..42414ed 100644
--- a/python-exrex.spec
+++ b/python-exrex.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-exrex
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -31,6 +31,8 @@ BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-setuptools
+Requires(post): update-alternatives
+Requires(postun): update-alternatives
 BuildArch:      noarch
 %python_subpackages
 
@@ -47,15 +49,22 @@ sed -i '1s/^#!.*//' exrex.py
 
 %install
 %python_install
+%python_clone -a %{buildroot}%{_bindir}/exrex
 rm %{buildroot}%{_bindir}/exrex.py
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
 # no upstream tests
 
+%post
+%python_install_alternative exrex
+
+%postun
+%python_uninstall_alternative exrex
+
 %files %{python_files}
 %{python_sitelib}/*
 %license COPYING
-%python3_only %{_bindir}/exrex
+%python_alternative %{_bindir}/exrex
 
 %changelog