diff --git a/protobuf.spec b/protobuf.spec
index c520d69..c7c1653 100644
--- a/protobuf.spec
+++ b/protobuf.spec
@@ -1,13 +1,14 @@
 Name:          protobuf
-Version:       2.5.0
-Release:       2mamba
+Version:       3.1.0
+Release:       1mamba
 Summary:       A way of encoding structured data in an efficient yet extensible format
 Group:         Development/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Ercole 'ercolinux' Carpanetto <ercole69@gmail.com>
 URL:           http://code.google.com/p/protobuf/
-Source:        http://protobuf.googlecode.com/files/protobuf-%{version}.tar.bz2
+Source:        https://github.com/google/protobuf.git/v%{version}/protobuf-%{version}.tar.bz2
+#Source:        http://protobuf.googlecode.com/files/protobuf-%{version}.tar.bz2
 License:       BSD
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 ## AUTOBUILDREQ-BEGIN
@@ -16,22 +17,34 @@ BuildRequires: libgcc
 BuildRequires: libstdc++6-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description
 Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats.
 
-%package devel
+%package -n lib%{name}
+Group:         System/Libraries
+Summary:       Shared libraries for %{name}
+
+%description -n lib%{name}
+Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats.
+This package contains shared libraries for %{name}.
+
+%package -n lib%{name}-devel
 Summary:       Devel package for %{name}
 Group:         Development/Libraries
-Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Provides:      protobuf-devel
+Obsoletes:     protobuf-devel
 
-%description devel
+%description -n lib%{name}-devel
 This package contains static libraries and header files need for development of Protocol Buffer
 
 %prep
 %setup -q
 
 %build
+./autogen.sh
 %configure
 %make
 
@@ -42,33 +55,35 @@ This package contains static libraries and header files need for development of
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
-%post -p /sbin/ldconfig
-%postun -p /sbin/ldconfig
+%post -n lib%{name} -p /sbin/ldconfig
+%postun -n lib%{name} -p /sbin/ldconfig
 
 %files
 %defattr(-,root,root)
 %{_bindir}/protoc
-%{_libdir}/*.so.*
-%doc README.txt
 
-%files devel
+%files -n lib%{name}
 %defattr(-,root,root)
-%dir %{_includedir}/google
-%{_includedir}/google/protobuf/compiler/cpp/*.h
-%{_includedir}/google/protobuf/*.proto
-%{_includedir}/google/protobuf/compiler/*.h
-%{_includedir}/google/protobuf/compiler/java/*.h
-%{_includedir}/google/protobuf/compiler/*.proto
-%{_includedir}/google/protobuf/compiler/python/*.h
-%{_includedir}/google/protobuf/*.h
-%{_includedir}/google/protobuf/io/*.h
-%{_includedir}/google/protobuf/stubs/*.h
-%{_libdir}/*.a
-%{_libdir}/*.la
-%{_libdir}/*.so
-%{_libdir}/pkgconfig/*.pc
+%{_libdir}/libprotobuf*.so.*
+%{_libdir}/libprotoc.so.*
+%doc LICENSE
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
+%dir %{_includedir}/google/protobuf
+%{_includedir}/google/protobuf/*
+%{_libdir}/libprotobuf*.a
+%{_libdir}/libprotobuf*.la
+%{_libdir}/libprotobuf*.so
+%{_libdir}/libprotoc.a
+%{_libdir}/libprotoc.la
+%{_libdir}/libprotoc.so
+%{_libdir}/pkgconfig/protobuf*.pc
 
 %changelog
+* Mon Oct 17 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 3.1.0-1mamba
+- update to 3.1.0
+
 * Wed Dec 30 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.5.0-2mamba
 - rebuilt with gcc 5.3.0