diff --git a/HISTORY.rst b/HISTORY.rst
index 150866b..16ad82e 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+2024-05-11b : v0.13.1 'Setup me down !'
+---------------------------------------
+
+* see https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details
+
+
 2024-05-11a : v0.13.0 'PEP 667 me up !'
 ---------------------------------------
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0267558
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,36 @@
+[build-system]  # flit_core seems the step after 'setuptools','wheel','build','twine' (see https://github.com/pypa/build/issues/394)
+requires = ["flit_core"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "sqlite_bro"
+authors = [
+    {name = "stonebig"},
+]
+dependencies = []
+requires-python = ">=3.3"
+readme = "README.rst"
+license = {file = "LICENSE"}
+classifiers=[
+    'Intended Audience :: Education',
+    'License :: OSI Approved :: MIT License',
+    'Operating System :: MacOS',
+    'Operating System :: Microsoft :: Windows',
+    'Operating System :: OS Independent',
+    'Operating System :: POSIX',
+    'Operating System :: Unix',
+    'Programming Language :: Python :: 3',
+    'Development Status :: 5 - Production/Stable',
+    'Topic :: Scientific/Engineering',
+    'Topic :: Software Development :: Widget Sets',
+]
+dynamic = ["version",]
+description="a graphic SQLite Client in 1 Python file"
+keywords = ["sqlite", "gui", "ttk", "sql"]
+
+[project.urls]
+Documentation = "https://github.com/stonebig/sqlite_bro/README.rst"
+Source = "https://github.com/stonebig/sqlite_bro"
+
+[project.scripts]
+sqlite_bro = "sqlite_bro.sqlite_bro:_main"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 7469488..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,5 +0,0 @@
-[metadata]
-description-file = README.rst
-
-[bdist_wheel]
-universal = 1
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 9ba895e..0000000
--- a/setup.py
+++ /dev/null
@@ -1,54 +0,0 @@
-# -*- coding: utf-8 -*-
-from __future__ import with_statement
-import os
-from setuptools import setup
-
-
-def get_version():
-    with open(os.path.join('sqlite_bro', 'sqlite_bro.py')) as f:
-        for line in f:
-            if line.strip().startswith('self.__version__'):
-                return eval(line.split('=')[-1])
-
-
-def read(*paths):
-    """Build a file path from *paths* and return the contents."""
-    with open(os.path.join(*paths), 'r') as f:
-        return f.read()
-
-
-setup(
-    name='sqlite_bro',
-    version=get_version(),
-    description="a graphic SQLite Client in 1 Python file",
-
-    long_description=(read('README.rst')),
-    keywords=['sqlite', 'gui', 'ttk', 'sql'],
-    author='stonebig',
-    author_email='write_pull_requests_to_stonebig@github.com',
-    url='https://github.com/stonebig/sqlite_bro',
-    license='MIT license',
-    # py_modules=['sqlite_bro'],
-    packages=['sqlite_bro', 'sqlite_bro.tests'],
-    # package_dir={"sqlite_bro": "sqlite_bro"},
-    # namespace_packages=[],
-    include_package_data=True,
-    # zip_safe=False,
-    # install_requires=[],
-    entry_points={
-        'console_scripts': [
-            'sqlite_bro = sqlite_bro.sqlite_bro:_main',
-        ],
-    },
-    classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Environment :: Console',
-        'Intended Audience :: Education',
-        'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Topic :: Scientific/Engineering :: Information Analysis',
-    ]
-)
diff --git a/sqlite_bro/__init__.py b/sqlite_bro/__init__.py
index e69de29..80a9c66 100644
--- a/sqlite_bro/__init__.py
+++ b/sqlite_bro/__init__.py
@@ -0,0 +1 @@
+__version__ = '0.13.1'
\ No newline at end of file
diff --git a/sqlite_bro/sqlite_bro.py b/sqlite_bro/sqlite_bro.py
index b6a4d06..131083f 100644
--- a/sqlite_bro/sqlite_bro.py
+++ b/sqlite_bro/sqlite_bro.py
@@ -42,8 +42,8 @@ class App:
 
     def __init__(self, use_gui=True):
         """create a tkk graphic interface with a main window tk_win"""
-        self.__version__ = "0.13.0"
-        self._title = "of 2024-05-11a : 'PEP 667 me up !'"
+        self.__version__ = "0.13.1"
+        self._title = "of 2024-05-11b : 'Setup me down !'"
         self.conn = None  # Baresql database object
         self.database_file = ""
         self.initialdir = "."