diff --git a/libboost.spec b/libboost.spec
index 8717012..6397bfc 100644
--- a/libboost.spec
+++ b/libboost.spec
@@ -2,16 +2,14 @@
 %define pckmajver %(echo %version | cut -d. -f1-2 | tr . _)
 Name:          libboost
 Version:       1.78.0
-Release:       1mamba
+Release:       2mamba
 Summary:       Free peer-reviewed portable C++ source libraries
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.boost.org/
-Source:        https://boostorg.jfrog.io/artifactory/main/release/1.78.0/source/boost_%{pckver}.tar.bz2
-#Source:        https://dl.bintray.com/boostorg/release/%{version}/source/boost_%{pckver}.tar.bz2
-#Source:        http://download.sourceforge.net/sourceforge/boost/boost_%{pckver}.tar.bz2
+Source:        https://boostorg.jfrog.io/artifactory/main/release/%{version}/source/boost_%{pckver}.tar.bz2
 Patch0:        libboost-1.57.0-moc-libqt4-4.8.6.patch
 Patch1:        libboost-1.58.0-python-3.3.patch
 Patch2:        libboost-1.76.0-arm-upstream-fix-build.patch
@@ -44,9 +42,9 @@ Ten Boost libraries will be included in the C++ Standards Committee's upcoming C
 %package devel
 Group:         Development/Libraries
 Summary:       Devel package for libboost
-Requires:      %{name} = %{version}-%{release}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      python-boost-devel
-Obsoletes:     python-boost-devel
+Obsoletes:     python-boost-devel < 1.78.0-2mamba
 Requires:      python-boost-py3 = %{?epoch:%epoch:}%{version}-%{release}
 
 %description devel
@@ -60,7 +58,7 @@ This is the devel package.
 %package -n python-boost-py3
 Group:         System/Libraries
 Summary:       Boost.Python library for Python 3
-Requires:      %{name} = %{version}-%{release}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description -n python-boost-py3
 The Boost libraries provides free peer-reviewed portable C++ source libraries.
@@ -218,6 +216,9 @@ EXPAT_LIBPATH=%{_libdir} \
 %files
 %defattr(-,root,root)
 %{_libdir}/libboost_*.so.*
+%exclude %{_libdir}/libboost_python3*.so.*
+%exclude %{_libdir}/libboost_mpi_python3*.so.*
+%exclude %{_libdir}/libboost_numpy3*.so.*
 %doc LICENSE_1_0.txt
 
 %files devel
@@ -240,6 +241,9 @@ EXPAT_LIBPATH=%{_libdir} \
 %{_libdir}/libboost_numpy3*.so.*
 
 %changelog
+* Sun Mar 20 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.78.0-2mamba
+- exclude duplicated python libraries from main package
+
 * Mon Jan 03 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.78.0-1mamba
 - update to 1.78.0