diff --git a/python-build.spec b/python-build.spec
index 2c2401e..65ea32b 100644
--- a/python-build.spec
+++ b/python-build.spec
@@ -1,7 +1,7 @@
 %define pkgname %(echo %name | cut -d- -f2-)
 Name:          python-build
 Version:       1.0.3
-Release:       1mamba
+Release:       2mamba
 Summary:       A simple, correct PEP517 package builder
 Group:         System/Libraries
 Vendor:        openmamba
@@ -11,12 +11,11 @@ URL:           https://github.com/pypa/build
 Source:        https://pypi.debian.net/build/build-%{version}.tar.gz
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: libpython3-devel
-BuildRequires: python3.7dist(importlib-metadata)
-BuildRequires: python3.7dist(packaging)
-BuildRequires: python3.7dist(pyproject-hooks)
-BuildRequires: python3.7dist(tomli)
+BuildRequires: libpython311-devel
+BuildRequires: python3.11dist(packaging)
+BuildRequires: python3.11dist(pyproject-hooks)
 ## AUTOBUILDREQ-END
+BuildRequires: libpython3-devel >= 3.11.5
 
 %description
 %{summary}.
@@ -29,11 +28,26 @@ BuildRequires: python3.7dist(tomli)
 %setup -q -n build-%{version}
 
 %build
+%if "0%{?with_pyver}" == "03"
+# Bootstrap
+virtualenv-py310 -p %{__python3} env
+source env/bin/activate
+pip install build installer flit-core
+CFLAGS="%{optflags}" python -m build --no-isolation --wheel
+%else
 CFLAGS="%{optflags}" %{__python} -m build --no-isolation --wheel
+%endif
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%if "0%{?with_pyver}" == "03"
+# Bootstrap
+. ./env/bin/activate
+python -m installer --destdir=%{buildroot} --prefix=%{_prefix} dist/*.whl
+sed -i "s|$PWD/env/bin/python.*|%{__python3}|" %{buildroot}%{_bindir}/pyproject-build
+%else
 %{__python} -m installer --destdir=%{buildroot} dist/*.whl
+%endif
 
 %if "%{?with_pyver}" != "3"
 # Rename any conflicting file outside of python site packages tree
@@ -52,6 +66,9 @@ done
 %doc LICENSE
 
 %changelog
+* Sat Sep 23 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.3-2mamba
+- rebuilt with python3 = 3.11.5
+
 * Thu Sep 07 2023 Automatic Build System <autodist@mambasoft.it> 1.0.3-1mamba
 - automatic version update by autodist