diff --git a/mercurial.spec b/mercurial.spec
index 6f50993..0ffa65e 100644
--- a/mercurial.spec
+++ b/mercurial.spec
@@ -1,6 +1,6 @@
 Name:          mercurial
 Version:       5.6
-Release:       1mamba
+Release:       2mamba
 Summary:       A scalable distributed Source Control Management system
 Group:         Applications/Development
 Vendor:        openmamba
@@ -9,13 +9,13 @@ Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
 URL:           http://selenic.com/mercurial
 Source:        http://www.selenic.com/mercurial/release/mercurial-%{version}.tar.gz
 License:       GPL
-Requires:      python >= %python_version
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libpython-devel
+BuildRequires: libpython3-devel
 BuildRequires: python
 ## AUTOBUILDREQ-END
-BuildRequires: python-docutils
+BuildRequires: python-docutils-py3
+Requires:      python3
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -33,15 +33,16 @@ A tool called that allows browsing the history of a repository in a GUI.
 %setup -q
 
 %build
-CFLAGS="%{optflags}" python setup.py build
-%make -C doc
+CFLAGS="%{optflags}" %{__python3} setup.py build
+
+%make -C doc PYTHON=%{__python3}
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-python setup.py install \
+%{__python3} setup.py install \
    --root="%{buildroot}" \
    --install-headers=%{_includedir}/python \
-   --install-lib=%{python_sitearch} \
+   --install-lib=%{python3_sitearch} \
    --record=.packlist
 
 install -d %{buildroot}%{_mandir}/man1
@@ -57,7 +58,8 @@ rm -f .packlist
 
 %files -f .packlist
 %defattr(-,root,root)
-%{python27_sitearch}/mercurial/__modulepolicy__.py*
+%{python3_sitearch}/mercurial/__modulepolicy__.py*
+%{python3_sitearch}/mercurial/__pycache__/__modulepolicy__.cpython*.pyc
 %{_mandir}/man1/*
 %{_mandir}/man5/*
 %doc COPYING CONTRIBUTORS
@@ -67,6 +69,9 @@ rm -f .packlist
 %{_bindir}/hgk
 
 %changelog
+* Wed Dec 02 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 5.6-2mamba
+- rebuilt with python3
+
 * Wed Nov 04 2020 Automatic Build System <autodist@mambasoft.it> 5.6-1mamba
 - automatic version update by autodist