diff --git a/PyQt4.spec b/PyQt4.spec
index a9e7b60..2abecd9 100644
--- a/PyQt4.spec
+++ b/PyQt4.spec
@@ -2,7 +2,7 @@
 
 Name:          PyQt4
 Version:       4.12.3
-Release:       1mamba
+Release:       2mamba
 Summary:       Python bindings for the Qt cross platform GUI toolkit
 Group:         System/Libraries
 Vendor:        openmamba
@@ -28,12 +28,15 @@ BuildRequires: libpython-devel
 BuildRequires: libqt4-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libpython3-devel >= 3.7.4
 BuildRequires: chrpath
 BuildRequires: libXcursor-devel
 BuildRequires: python-dbus
 BuildRequires: python-dbus-devel
 # WARNING: do not parametrize python-sip-devel version or it will be useless for ports
-BuildRequires: python-sip-devel >= 4.19.13
+BuildRequires: python-sip-devel >= 4.19.18
+BuildRequires: python-sip-py3-devel >= 4.19.18
+BuildRequires: python-sip-py36-devel >= 4.19.18
 Requires:      python-sip = %{pythonsip_ver}
 Requires:      python-dbus
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
@@ -84,13 +87,6 @@ This package contains the QtDesigner support components for PyQt4.
 
 %prep
 %setup -q -n PyQt4_gpl_x11-%{version}
-#%patch0 -p0
-#% ifarch arm
-#% patch1 -p1
-#% endif
-#%ifarch x86_64
-#% patch2 -p1
-#%endif
 
 %build
 sed -i "/generate_code(\"phonon\")/s:phonon\":&, extra_include_dirs=[\"%{_includedir}/phonon\"]:" configure.py
@@ -126,10 +122,7 @@ find examples/ -type f -exec chmod 0644 {} ';'
 
 %files %{?with_pyver:py%{pyver}}
 %defattr(-,root,root)
-%if "%{?pyver}" != "36"
-%{python_sitelib}/dbus/mainloop/qt.so
-%endif
-%ifarch arm
+%if "%{?pyver}" != "3"
 %{python_sitelib}/dbus/mainloop/qt.so
 %endif
 %{python_sitearch}/PyQt4/Qt.so
@@ -173,6 +166,9 @@ find examples/ -type f -exec chmod 0644 {} ';'
 %{_qt4_plugindir}/designer/*
 
 %changelog
+* Thu Aug 08 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.12.3-2mamba
+- rebuilt with python3 3.7.4
+
 * Fri Dec 28 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 4.12.3-1mamba
 - update to 4.12.3