diff --git a/python-Parsley.changes b/python-Parsley.changes
index 6c96d36..086de54 100644
--- a/python-Parsley.changes
+++ b/python-Parsley.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed May 20 07:26:05 UTC 2020 - Petr Gajdos <pgajdos@suse.com>
+
+- %python3_only -> %python_alternative
+
 -------------------------------------------------------------------
 Thu Nov  7 15:02:03 UTC 2019 - Matej Cepl <mcepl@suse.com>
 
diff --git a/python-Parsley.spec b/python-Parsley.spec
index efdf6e2..768d78f 100644
--- a/python-Parsley.spec
+++ b/python-Parsley.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-Parsley
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LLC
 # Copyright (c) 2013 LISA GmbH, Bingen, Germany.
 #
 # All modifications and additions to the file contributed by third parties
@@ -31,6 +31,8 @@ BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
+Requires(post): update-alternatives
+Requires(postun): update-alternatives
 Provides:       python-parsley
 Obsoletes:      %{oldpython}-Parsley-doc
 Obsoletes:      python-Parsley-doc
@@ -67,6 +69,7 @@ for f in {generate_parser,stage}; do
 	-e "s|^#!%{_bindir}/env python$|#!%{_bindir}/python3|" \
 	bin/$f
     cp -v bin/$f %{buildroot}/%{_bindir}/parsley-$f
+    %python_clone -a %{buildroot}%{_bindir}/parsley-$f
 done
 
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
@@ -76,10 +79,19 @@ export LANG=en_US.UTF-8
 %pytest ometa/test
 %pytest terml/test
 
+%post
+%python_install_alternative parsley-stage
+%python_install_alternative parsley-generate_parser
+
+%postun
+%python_uninstall_alternative parsley-stage
+%python_uninstall_alternative parsley-generate_parser
+
 %files %{python_files}
 %license LICENSE
 %doc NEWS PKG-INFO README
-%python3_only %{_bindir}/parsley*
+%python_alternative %{_bindir}/parsley-stage
+%python_alternative %{_bindir}/parsley-generate_parser
 %{python_sitelib}/*
 
 %changelog