diff --git a/python-311.patch b/python-311.patch
deleted file mode 100644
index caacf14..0000000
--- a/python-311.patch
+++ /dev/null
@@ -1,34 +0,0 @@
-From 527e42f582849b3c1f73d5d525ae11d9ef21e0df Mon Sep 17 00:00:00 2001
-From: Dmitry Shachnev <mitya57@gmail.com>
-Date: Tue, 13 Dec 2022 15:44:05 +0300
-Subject: [PATCH] Remove redundant (?u) inline flags
-
-They are not needed because we pass re.UNICODE anyway.
-Also, inline flags not at the start of the expression are invalid
-starting with Python 3.11.
----
- pytils/typo.py | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-Index: pytils-0.4.1/pytils/typo.py
-===================================================================
---- pytils-0.4.1.orig/pytils/typo.py
-+++ pytils-0.4.1/pytils/typo.py
-@@ -149,13 +149,13 @@ def rl_quotes(x):
-         # открывающие кавычки ставятся обычно вплотную к слову слева
-         # а закрывающие -- вплотную справа
-         # открывающие русские кавычки-ёлочки
--        (re.compile(r'((?:^|\s))(")((?u))', re.UNICODE), '\\1\xab\\3'),
-+        (re.compile(r'((?:^|\s))(")', re.UNICODE), '\\1\xab'),
-         # закрывающие русские кавычки-ёлочки
--        (re.compile(r'(\S)(")((?u))', re.UNICODE), '\\1\xbb\\3'),
-+        (re.compile(r'(\S)(")', re.UNICODE), '\\1\xbb'),
-         # открывающие кавычки-лапки, вместо одинарных кавычек
--        (re.compile(r'((?:^|\s))(\')((?u))', re.UNICODE), '\\1\u201c\\3'),
-+        (re.compile(r'((?:^|\s))(\')', re.UNICODE), '\\1\u201c'),
-         # закрывающие кавычки-лапки
--	(re.compile(r'(\S)(\')((?u))', re.UNICODE), '\\1\u201d\\3'),
-+	(re.compile(r'(\S)(\')', re.UNICODE), '\\1\u201d'),
-     )
-     return _sub_patterns(patterns, x)
-     
diff --git a/python-pytils.changes b/python-pytils.changes
index c54da57..fbdc33e 100644
--- a/python-pytils.changes
+++ b/python-pytils.changes
@@ -1,3 +1,21 @@
+-------------------------------------------------------------------
+Tue Apr 22 07:30:27 UTC 2025 - John Paul Adrian Glaubitz <adrian.glaubitz@suse.com>
+
+- Update to 0.4.3
+  * Fix invalid escape sequence in numeral.choose_plural.py
+  * RegExp syntax error
+  * Remove redundant (?u) inline flags
+  * The u prefix for strings is no longer necessary in Python >= 3.0
+- from version 0.4.2
+  * (identical to version 0.4.3)
+- Drop python-311.patch, merged upstream
+- Switch build system from setuptools to pyproject.toml
+  * Add python-pip and python-wheel to BuildRequires
+  * Replace %python_build with %pyproject_wheel
+  * Replace %python_install with %pyproject_install
+- Update BuildRequires from pyproject.toml
+- Use Python 3.11 on SLE-15 by default
+
 -------------------------------------------------------------------
 Tue Feb 21 09:48:12 UTC 2023 - Daniel Garcia <daniel.garcia@suse.com>
 
diff --git a/python-pytils.spec b/python-pytils.spec
index 2dbdfe5..9f1b27e 100644
--- a/python-pytils.spec
+++ b/python-pytils.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-pytils
 #
-# Copyright (c) 2023 SUSE LLC
+# Copyright (c) 2025 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,17 +16,19 @@
 #
 
 
+%{?sle15_python_module_pythons}
 Name:           python-pytils
-Version:        0.4.1
+Version:        0.4.3
 Release:        0
 Summary:        A Russian-specific string utility module
 License:        MIT
 Group:          Development/Languages/Python
 URL:            https://github.com/y10h/pytils
 Source:         https://files.pythonhosted.org/packages/source/p/pytils/pytils-%{version}.tar.gz
-# PATCH-FIX-UPSTREAM python-311.patch, gh#last-partizan/pytils#50
-Patch0:         python-311.patch
+BuildRequires:  %{python_module pip}
+BuildRequires:  %{python_module poetry-core}
 BuildRequires:  %{python_module setuptools}
+BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 BuildArch:      noarch
@@ -41,10 +43,10 @@ transliteration, etc.)
 %autosetup -p1 -n pytils-%{version}
 
 %build
-%python_build
+%pyproject_wheel
 
 %install
-%python_install
+%pyproject_install
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
diff --git a/pytils-0.4.1.tar.gz b/pytils-0.4.1.tar.gz
deleted file mode 100644
index dbf6db8..0000000
--- a/pytils-0.4.1.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:aa109b1bc0ec4bdb7c9768520110348d8aeb0706600e6cf641272e6850e26eab
-size 99144
diff --git a/pytils-0.4.3.tar.gz b/pytils-0.4.3.tar.gz
new file mode 100644
index 0000000..a1b015e
--- /dev/null
+++ b/pytils-0.4.3.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4828464cdb54b344843cfc5a7ed5cf5c605cb7e72e46a58b6ed2885568f301e5
+size 101364