diff --git a/python-waitress.changes b/python-waitress.changes
index 0cb438a..69d33c9 100644
--- a/python-waitress.changes
+++ b/python-waitress.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Aug 27 12:27:31 UTC 2021 - Stefan Schubert <schubi@suse.de>
+
+- Use libalternatives instead of update-alternatives.
+
 -------------------------------------------------------------------
 Fri Aug 27 11:27:31 UTC 2021 - pgajdos@suse.com
 
diff --git a/python-waitress.spec b/python-waitress.spec
index 16d6b78..bb6e0ca 100644
--- a/python-waitress.spec
+++ b/python-waitress.spec
@@ -1,5 +1,5 @@
 #
-# spec file
+# spec file for package python-waitress
 #
 # Copyright (c) 2021 SUSE LLC
 #
@@ -16,6 +16,12 @@
 #
 
 
+%if 0%{?suse_version} > 1500
+%bcond_without libalternatives
+%else
+%bcond_with libalternatives
+%endif
+
 %global flavor @BUILD_FLAVOR@%{nil}
 
 %if "%{flavor}" == "doc"
@@ -39,13 +45,18 @@ Source:         https://files.pythonhosted.org/packages/source/w/waitress/waitre
 Source1:        python3.inv
 Source2:        fetch-intersphinx-inventories.sh
 BuildRequires:  fdupes
-BuildRequires:  python-rpm-macros
+BuildRequires:  python-rpm-macros >= 20210929
 %if "%{flavor}" == ""
 BuildRequires:  %{python_module pytest-cov}
 BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools}
+%if %{with libalternatives}
+Requires:       alts
+BuildRequires:  alts
+%else
 Requires(post): update-alternatives
 Requires(postun):update-alternatives
+%endif
 %else
 # Documentation requirements
 BuildRequires:  python3-Sphinx
@@ -81,6 +92,10 @@ http://docs.pylonsproject.org/projects/waitress/en/latest/ .
 # disable one test, that requires network
 %pytest -k 'not test_service_port'
 
+%pre
+# If libalternatives is used: Removing old update-alternatives entries.
+%python_libalternatives_reset_alternative waitress-serve
+
 %post
 %python_install_alternative waitress-serve