diff --git a/aiosmtpd-pr557-pkg_resources.patch b/aiosmtpd-pr557-pkg_resources.patch
new file mode 100644
index 0000000..ab6e2e7
--- /dev/null
+++ b/aiosmtpd-pr557-pkg_resources.patch
@@ -0,0 +1,47 @@
+From 533ed1304c57bc7179bf88e5f5f81f4bb329b1dd Mon Sep 17 00:00:00 2001
+From: John Bucy <bucy@gloop.org>
+Date: Wed, 18 Jun 2025 11:05:23 -0700
+Subject: [PATCH 1/2] migrate config_test from pkg_resources to
+ importlib_resources
+
+pkg_resources is now throwing a deprecation warning
+this is only used to get the cert filenames
+
+https://setuptools.pypa.io/en/latest/pkg_resources.html
+https://importlib-resources.readthedocs.io/en/latest/migration.html
+---
+ aiosmtpd/tests/conftest.py | 13 ++++++++++---
+ requirements-dev.txt       |  1 +
+ 2 files changed, 11 insertions(+), 3 deletions(-)
+
+Index: aiosmtpd-1.4.6/aiosmtpd/tests/conftest.py
+===================================================================
+--- aiosmtpd-1.4.6.orig/aiosmtpd/tests/conftest.py
++++ aiosmtpd-1.4.6/aiosmtpd/tests/conftest.py
+@@ -12,7 +12,7 @@ from smtplib import SMTP as SMTPClient
+ from typing import Any, Callable, Generator, NamedTuple, Optional, Type, TypeVar
+ 
+ import pytest
+-from pkg_resources import resource_filename
++import importlib.resources
+ from pytest_mock import MockFixture
+ 
+ from aiosmtpd.controller import Controller
+@@ -73,8 +73,15 @@ class Global:
+ # If less than 1.0, might cause intermittent error if test system
+ # is too busy/overloaded.
+ AUTOSTOP_DELAY = 1.5
+-SERVER_CRT = resource_filename("aiosmtpd.tests.certs", "server.crt")
+-SERVER_KEY = resource_filename("aiosmtpd.tests.certs", "server.key")
++# https://importlib-resources.readthedocs.io/en/latest/migration.html
++# this assumes these files are already present in the filesystem so
++# it doesn't need to extract a tempfile for the context manager to clean up
++ref = importlib.resources.files("aiosmtpd.tests.certs") / "server.crt"
++with importlib.resources.as_file(ref) as path:
++    SERVER_CRT = str(path)
++ref = importlib.resources.files("aiosmtpd.tests.certs") / "server.key"
++with importlib.resources.as_file(ref) as path:
++    SERVER_KEY = str(path)
+ 
+ # endregion
+ 
diff --git a/python-aiosmtpd.changes b/python-aiosmtpd.changes
index b54b8f6..bcb8ac7 100644
--- a/python-aiosmtpd.changes
+++ b/python-aiosmtpd.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jan  2 12:16:00 UTC 2026 - Ben Greiner <code@bnavigator.de>
+
+- Add aiosmtpd-pr557-pkg_resources.patch gh#aio-libs/aiosmtpd#557
+  for setuptools 80
+
 -------------------------------------------------------------------
 Mon Nov 10 04:59:40 UTC 2025 - Steve Kowalik <steven.kowalik@suse.com>
 
diff --git a/python-aiosmtpd.spec b/python-aiosmtpd.spec
index 9f78eb4..55c62b0 100644
--- a/python-aiosmtpd.spec
+++ b/python-aiosmtpd.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-aiosmtpd
 #
-# Copyright (c) 2025 SUSE LLC and contributors
+# Copyright (c) 2026 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
@@ -29,6 +29,8 @@ Source:         https://github.com/aio-libs/aiosmtpd/archive/v%{version}.tar.gz#
 Patch0:         support-python-313.patch
 # PATCH-FIX-OPENSUSE Use inspect.iscorountine
 Patch1:         support-python-314.patch
+# PATCH-FIX-UPSTREAM aiosmtpd-pr557-pkg_resources.patch gh#aio-libs/aiosmtpd#557
+Patch2:         aiosmtpd-pr557-pkg_resources.patch
 BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module wheel}