diff --git a/module-build-service.spec b/module-build-service.spec
index b8dc961..b59f3cf 100644
--- a/module-build-service.spec
+++ b/module-build-service.spec
@@ -1,6 +1,11 @@
+%if 0%{?fedora}
+# Not all python modules are built with Python3 in EPEL
+%global with_python3 1
+%endif
+
 Name:           module-build-service
 Version:        2.0.2
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        The Module Build Service for Modularity
 
 Group:          Development/Tools
@@ -16,32 +21,47 @@ BuildArch:      noarch
 ExclusiveArch:  %{ix86} x86_64 noarch
 %endif
 
+%if 0%{?with_python3}
+
+BuildRequires:  python3-devel
+BuildRequires:  python3-setuptools
+BuildRequires:  python3-m2crypto
+BuildRequires:  python3-mock
+BuildRequires:  python3-pdc-client
+BuildRequires:  python3-flask-script
+BuildRequires:  python3-munch
+BuildRequires:  python3-funcsigs
+BuildRequires:  python3-solv
+BuildRequires:  python3-gobject-base
+BuildRequires:  python3-openidc-client
+BuildRequires:  python3-ldap3
+BuildRequires:  python3-koji
+BuildRequires:  python3-setuptools
+BuildRequires:  python3-flask-sqlalchemy
+BuildRequires:  python3-flask-migrate
+BuildRequires:  python3-six
+BuildRequires:  python3-flask
+BuildRequires:  python3-dogpile-cache
+BuildRequires:  python3-requests
+BuildRequires:  python3-pyOpenSSL
+BuildRequires:  python3-sqlalchemy
+
+%else
+
 BuildRequires:  python2-devel
 
 BuildRequires:  python2-mock
-BuildRequires:  fedmsg
-BuildRequires:  git
-BuildRequires:  help2man
-BuildRequires:  kobo
-BuildRequires:  kobo-rpmlib
-
 BuildRequires:  m2crypto
-BuildRequires:  mock
 BuildRequires:  python2-pdc-client
 BuildRequires:  python-flask-script
 BuildRequires:  python-m2ext
 BuildRequires:  python-munch
 BuildRequires:  python2-funcsigs
-BuildRequires:  libmodulemd
 BuildRequires:  python2-solv
-BuildRequires:  gobject-introspection
 BuildRequires:  python-gobject-base
-BuildRequires:  rpm-build
-BuildRequires:  python-qpid
 BuildRequires:  python-openidc-client
 BuildRequires:  python-ldap3
 BuildRequires:  python-enum34
-
 BuildRequires:  python2-koji
 
 %if 0%{?rhel} && 0%{?rhel} <= 7
@@ -71,43 +91,54 @@ BuildRequires:  python2-pyOpenSSL
 BuildRequires:  python2-sqlalchemy
 %endif
 
-BuildRequires:  systemd
+%endif
 
-Requires:       systemd
-Requires:       fedmsg
-Requires:       fedpkg
-Requires:       git
-Requires:       kobo
-Requires:       kobo-rpmlib
-Requires:       m2crypto
-Requires:       mock
+BuildRequires:  fedmsg
+BuildRequires:  git-core
+BuildRequires:  help2man
+BuildRequires:  kobo
+BuildRequires:  kobo-rpmlib
+BuildRequires:  mock
+BuildRequires:  libmodulemd
+BuildRequires:  gobject-introspection
+BuildRequires:  rpm-build
+
+%if 0%{?with_python3}
+Requires:       python3-pdc-client
+Requires:       python3-flask-script
+Requires:       python3-munch
+Requires:       python3-funcsigs
+Requires:       python3-openidc-client
+Requires:       python3-ldap3
+Requires:       python3-gobject-base
+Requires:       python3-solv
+Requires:       python3-koji
+Requires:       python3-flask-sqlalchemy
+Requires:       python3-flask-migrate
+Requires:       python3-mock
+Requires:       python3-six
+
+Requires:       python3-sqlalchemy
+Requires:       python3-flask
+Requires:       python3-dogpile-cache
+Requires:       python3-requests
+%else
 Requires:       python2-pdc-client
-Requires:       pyOpenSSL
 Requires:       python-flask-script
-Requires:       python-m2ext
 Requires:       python-munch
 Requires:       python2-funcsigs
-Requires:       libmodulemd
-Requires:       rpm-build
-Requires:       python-qpid
 Requires:       python-enum34
 Requires:       python-openidc-client
 Requires:       python-ldap3
-Requires:       gobject-introspection
 Requires:       python-gobject-base
 Requires:       python2-solv
-
 Requires:       python2-koji
 
-# https://bugzilla.redhat.com/show_bug.cgi?id=1466792
-Requires:       mock-scm
-
 %if 0%{?rhel} && 0%{?rhel} <= 7
 Requires:       python-flask-sqlalchemy
 Requires:       python-flask-migrate
 Requires:       python-mock
 Requires:       python-six
-Requires:       pyOpenSSL
 Requires:       python-sqlalchemy
 Requires:       python-futures
 Requires:       python-flask
@@ -127,6 +158,22 @@ Requires:       python2-pyOpenSSL
 Requires:       python2-sqlalchemy
 %endif
 
+%endif
+
+Requires:       fedmsg
+Requires:       fedpkg
+Requires:       git-core
+Requires:       kobo
+Requires:       kobo-rpmlib
+Requires:       m2crypto
+Requires:       mock
+Requires:       pyOpenSSL
+Requires:       libmodulemd
+Requires:       rpm-build
+Requires:       gobject-introspection
+# https://bugzilla.redhat.com/show_bug.cgi?id=1466792
+Requires:       mock-scm
+
 
 %description
 The Module Build Service (MBS) coordinates module builds and is responsible
@@ -158,13 +205,27 @@ rm -f module_build_service/scheduler/consumer.pyc
 rm -f module_build_service/.mbs_local_build.db
 
 %build
+%if 0%{?with_python3}
+%py3_build
+%else
 %py2_build
+%endif
+
 
 %install
+%if 0%{?with_python3}
+%py3_install
+%else
 %py2_install
+%endif
 
 %if 0%{?with_epel}
+
+%if 0%{?with_python3}
+export PYTHONPATH=%{buildroot}%{python3_sitelib}
+%else
 export PYTHONPATH=%{buildroot}%{python2_sitelib}
+%endif
 mkdir -p %{buildroot}/%{_mandir}/man1
 for command in mbs-manager mbs-frontend mbs-upgradedb ; do
 MBS_CONFIG_FILE=conf/config.py %{buildroot}/%{_bindir}/$command --help || true
@@ -183,7 +244,13 @@ done
 %files
 %doc README.rst
 %license LICENSE
+
+%if 0%{?with_python3}
+%{python3_sitelib}/module_build_service*
+%else
 %{python2_sitelib}/module_build_service*
+%endif
+
 %{_bindir}/mbs-*
 %dir %{_sysconfdir}/module-build-service
 %config(noreplace) %{_sysconfdir}/module-build-service/config.py
@@ -197,8 +264,14 @@ done
 %config(noreplace) %{_sysconfdir}/fedmsg.d/module_build_service.py
 %exclude %{_sysconfdir}/module-build-service/*.py[co]
 %exclude %{_sysconfdir}/fedmsg.d/*.py[co]
+
+%if 0%{?with_python3}
+%exclude %{python3_sitelib}/conf/
+%exclude %{python3_sitelib}/tests/
+%else
 %exclude %{python2_sitelib}/conf/
 %exclude %{python2_sitelib}/tests/
+%endif
 
 %if 0%{?with_epel}
 %{_mandir}/man1/mbs-*.1*
@@ -206,6 +279,9 @@ done
 
 
 %changelog
+* Tue Apr 17 2018 Jan Kaluza <jkaluza@redhat.com> - 2.0.2-4
+- use python3 by default
+
 * Thu Apr 05 2018 Jan Kaluza <jkaluza@redhat.com> - 2.0.2-3
 - fix wrong component reuse caused by missing change for buildrequires.