diff --git a/hplip.spec b/hplip.spec
index dcbdd5a..70fa8ee 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -3,7 +3,7 @@
 %define cups_ver %(cups-config --api-version)
 Name:          hplip
 Version:       3.20.9
-Release:       1mamba
+Release:       3mamba
 Summary:       A printer driver for HP inkjet devices
 Group:         System/Spooling
 Vendor:        openmamba
@@ -21,39 +21,46 @@ Patch5:        hplip-3.19.6-remove-libImageProcessor.patch
 License:       BSD, LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
+BuildRequires: ldconfig
+BuildRequires: libavahi-devel
 BuildRequires: libcups-devel
 BuildRequires: libdbus-devel
 BuildRequires: libgcc
 BuildRequires: libjpeg-devel
+BuildRequires: liblzma-devel
 BuildRequires: libnetsnmp-devel
+BuildRequires: libnsl-devel
 BuildRequires: libopenssl-devel
 BuildRequires: libperl
 BuildRequires: libpython-devel
 BuildRequires: libsane-backends-devel
+BuildRequires: libssp-devel
 BuildRequires: libstdc++6-devel
-BuildRequires: libusbx-devel
+BuildRequires: libsystemd-devel
+BuildRequires: libudev-devel
+BuildRequires: libusb-compat-devel
+BuildRequires: libusb-devel
+BuildRequires: libxml2-devel
+BuildRequires: libz-devel
 BuildRequires: perl-devel
 ## AUTOBUILDREQ-END
 BuildRequires: gcc-fortran >= 4.0.1
 BuildRequires: libieee1284-devel
 BuildRequires: libgphoto-devel
-BuildRequires: libavahi-devel
-BuildRequires: libssp-devel
-BuildRequires: libudev-devel
-Obsoletes:     hpijs
 Requires:      cups
-Requires:      PyQt5-py36
-Requires:      python-Pillow-py36
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
-Requires(pre): libsane-backends >= 1.0.16
-%ifarch x86_64
-Provides:      libImageProcessor.so()(64bit)
-Provides:      libImageProcessor.so(VERS_1.0)(64bit)
-%else
-Provides:      libImageProcessor.so
-Provides:      libImageProcessor.so(VERS_1.0)
-%endif
+Requires:      PyQt5-py3
+Requires:      python-Pillow-py3
 Provides:      hpijs = %{version}
+Obsoletes:     hpijs
+Requires(pre): libsane-backends >= 1.0.16
+#%ifarch x86_64
+#Provides:      libImageProcessor.so()(64bit)
+#Provides:      libImageProcessor.so(VERS_1.0)(64bit)
+#%else
+#Provides:      libImageProcessor.so
+#Provides:      libImageProcessor.so(VERS_1.0)
+#%endif
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 A printer driver for HP inkjet devices.
@@ -77,6 +84,8 @@ Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 A printer driver for HP inkjet devices.
 This package contains the proprietary plugins needed by some printers.
 
+%debug_package
+
 %prep
 %setup -q
 #%patch0 -p1
@@ -96,7 +105,7 @@ sh %{SOURCE1} --target hplip-%{version}-plugin --noexec
 
 #replace shebang lines to python3 interpreter (from hplip-install)
 PAT1="#!\/usr\/bin\/(env )?python$"
-PAT2="#!\/usr\/bin\/env python3\.6"
+PAT2="#!\/usr\/bin\/env python3"
 for pyfile in `find . -maxdepth 1 -name "*.py"`; do
    sed -i -r "0,/$PAT1/s//$PAT2/" $pyfile
 done
@@ -119,7 +128,7 @@ autoreconf -f -i
    --enable-cups-drv-install \
    --enable-cups-ppd-install \
    --with-hpppddir=%{_datadir}/cups/model/HP \
-   PYTHON=%{__python36}
+   PYTHON=%{__python3}
 
 # \
 #   --disable-foomatic_install
@@ -256,11 +265,11 @@ fi
 %{_libdir}/sane/libsane-hpaio.so.*
 %{_libdir}/sane/libsane-hpaio.so
 #%{_libdir}/menu/hplip
-%{python36_sitearch}/*.so
-%{python36_sitearch}/cupsext.la
-%{python36_sitearch}/hpmudext.la
-%{python36_sitearch}/scanext.la
-%{python36_sitearch}/pcardext.la
+%{python3_sitearch}/*.so
+%{python3_sitearch}/cupsext.la
+%{python3_sitearch}/hpmudext.la
+%{python3_sitearch}/scanext.la
+%{python3_sitearch}/pcardext.la
 %{_datadir}/applications/hplip.desktop
 %{_datadir}/cups/drv/hp/hpijs.drv
 %{_datadir}/cups/drv/hp/hpcups.drv
@@ -309,6 +318,12 @@ fi
 %{_localstatedir}/lib/hp/hplip.state
 
 %changelog
+* Sat Nov 07 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 3.20.9-3mamba
+- fix shebangs for python3
+
+* Mon Nov 02 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 3.20.9-2mamba
+- rebuilt with python3
+
 * Wed Oct 07 2020 Automatic Build System <autodist@mambasoft.it> 3.20.9-1mamba
 - automatic version update by autodist