diff --git a/python-virtualenv.spec b/python-virtualenv.spec
index c68a9a9..5d0b9a7 100644
--- a/python-virtualenv.spec
+++ b/python-virtualenv.spec
@@ -1,6 +1,6 @@
 Name:          python-virtualenv
 Version:       15.1.0
-Release:       2mamba
+Release:       3mamba
 Summary:       Virtual Python Environment builder
 Group:         System/Libraries/Python
 Vendor:        openmamba
@@ -13,8 +13,15 @@ License:       MIT
 BuildRequires: libpython-devel
 ## AUTOBUILDREQ-END
 BuildRequires: help2man
+%if "%{?with_pyver}"
+Requires:      python3 >= %python3_version
+Requires:      libpython3-devel
+Requires:      python-setuptools-py3
+%else
 Requires:      python >= %python_version
+Requires:      libpython-devel
 Requires:      python-setuptools
+%endif
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 BuildArch:     noarch
 
@@ -70,6 +77,9 @@ mv %{buildroot}%{_mandir}/man1/virtualenv.1 %{buildroot}%{_mandir}/man1/virtuale
 %{_mandir}/man1/virtualenv*.1*
 
 %changelog
+* Tue Sep 19 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 15.1.0-3mamba
+- added requirement for py3 version
+
 * Thu Jul 13 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 15.1.0-2mamba
 - rename virtualenv to virtualenv2 in py2 package to support co-existence