diff --git a/python-pythondialog.spec b/python-pythondialog.spec
index 97515e0..705b44a 100644
--- a/python-pythondialog.spec
+++ b/python-pythondialog.spec
@@ -1,48 +1,55 @@
+%define pkgname %(echo %name | cut -d- -f2- | tr - _)
 Name:          python-pythondialog
-Version:       3.5.1
+Version:       3.5.3
 Release:       1mamba
 Summary:       A Python interface to the UNIX dialog utility and mostly-compatible programs (Python 2 backport)
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://pythondialog.sourceforge.net/
-Source:        https://pypi.debian.net/python2-pythondialog/python2-pythondialog-%{version}.tar.gz
+URL:           https://pythondialog.sourceforge.io/
+Source:        https://pypi.debian.net/pythondialog/pythondialog-%{version}.tar.gz
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: libpython-devel
+BuildRequires: libpython311-devel
 ## AUTOBUILDREQ-END
-Provides:      python2-pythondialog
-Requires:      python >= %python_version
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 %{summary}.
 
+%if 0%{?with_pyver}
+%pyver_package
+%endif
+
 %prep
-%setup -q -n python2-pythondialog-%{version}
+%setup -q -n pythondialog-%{version}
 
 %build
-CFLAGS="%{optflags}" %{__python} setup.py build
+CFLAGS="%{optflags}" %{__python} -m build --no-isolation --wheel
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-%{__python} setup.py install \
-   -O1 --skip-build \
-   --root="%{buildroot}" \
-   --install-headers=%{_includedir}/python \
-   --install-lib=%{python_sitearch} \
-   --record=%{name}.filelist
+%{__python} -m installer --destdir=%{buildroot} dist/*.whl
 
-sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
+#%if "%{?with_pyver}" != "3"
+## Rename any conflicting file outside of python site packages tree
+#for f in %{_bindir}/pdm; do
+#   mv %{buildroot}${f}{,-%{?pyappend}}
+#done
+#%endif
 
-%files -f %{name}.filelist
+%files %{?pyappend}
 %defattr(-,root,root)
-%dir %{python_sitearch}/python2_pythondialog-%{version}-py*.egg-info
-%{python_sitearch}/python2_pythondialog-%{version}-py*.egg-info/*
+%dir %{python_sitelib}/%{pkgname}-%{version}.dist-info
+%{python_sitelib}/%{pkgname}-%{version}.dist-info/*
+%{python3_sitelib}/__pycache__/dialog.cpython-*.pyc
+%{python3_sitelib}/dialog.py
 %doc AUTHORS COPYING
 
 %changelog
+* Wed Dec 04 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 3.5.3-1mamba
+- update to 3.5.3
+
 * Fri Feb 14 2020 Automatic Build System <autodist@mambasoft.it> 3.5.1-1mamba
 - automatic version update by autodist