diff --git a/python-aiosmtpd.changes b/python-aiosmtpd.changes
index fc30e94..085cd76 100644
--- a/python-aiosmtpd.changes
+++ b/python-aiosmtpd.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed May 27 09:36:02 UTC 2020 - Petr Gajdos <pgajdos@suse.com>
+
+- %python3_only -> %python_alternative
+
 -------------------------------------------------------------------
 Thu Jan  2 07:32:50 UTC 2020 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/python-aiosmtpd.spec b/python-aiosmtpd.spec
index 66fced5..d92cb96 100644
--- a/python-aiosmtpd.spec
+++ b/python-aiosmtpd.spec
@@ -33,6 +33,8 @@ BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-atpublic
 Requires:       user(nobody)
+Requires(post): update-alternatives
+Requires(postun): update-alternatives
 BuildArch:      noarch
 # SECTION test requirements
 BuildRequires:  %{python_module atpublic}
@@ -54,16 +56,23 @@ cp %{SOURCE1} .
 
 %install
 %python_install
+%python_clone -a %{buildroot}%{_bindir}/aiosmtpd
 %python_expand rm -r %{buildroot}%{$python_sitelib}/examples
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
 %pytest
 
+%post
+%python_install_alternative aiosmtpd
+
+%postun
+%python_uninstall_alternative aiosmtpd
+
 %files %{python_files}
 %doc README.rst
 %license LICENSE-2.0.txt
-%python3_only %{_bindir}/aiosmtpd
+%python_alternative %{_bindir}/aiosmtpd
 %{python_sitelib}/*
 
 %changelog