diff --git a/python-websockify.changes b/python-websockify.changes
index 9d354b9..79fc0c5 100644
--- a/python-websockify.changes
+++ b/python-websockify.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Aug 26 09:33:52 UTC 2025 - Markéta Machová <mmachova@suse.com>
+
+- Convert to libalternatives on SLE-16-based and newer systems
+
 -------------------------------------------------------------------
 Sat Oct 19 11:51:49 UTC 2024 - Dirk Müller <dmueller@suse.com>
 
diff --git a/python-websockify.spec b/python-websockify.spec
index 7572117..06d4990 100644
--- a/python-websockify.spec
+++ b/python-websockify.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-websockify
 #
-# Copyright (c) 2024 SUSE LLC
+# Copyright (c) 2025 SUSE LLC and contributors
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,6 +16,11 @@
 #
 
 
+%if 0%{?suse_version} > 1500
+%bcond_without libalternatives
+%else
+%bcond_with libalternatives
+%endif
 %{?sle15_python_module_pythons}
 Name:           python-websockify
 Version:        0.12.0
@@ -34,10 +39,15 @@ BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 BuildRequires:  %{python_module numpy if (%python-base without python36-base)}
+Requires:       python-jwcrypto
+BuildArch:      noarch
+%if %{with libalternatives}
+BuildRequires:  alts
+Requires:       alts
+%else
 Requires(post): update-alternatives
 Requires(postun): update-alternatives
-BuildArch:      noarch
-Requires:       python-jwcrypto
+%endif
 %if 0%{?suse_version}
 Recommends:     python-redis
 Recommends:     python-requests
@@ -84,6 +94,9 @@ sed -i '1 { /^#!/ d }' websockify/websock*.py
 %check
 %pytest -k 'not test_asymmetric_jwe_token_plugin'
 
+%pre
+%python_libalternatives_reset_alternative websockify
+
 %post
 %python_install_alternative websockify