diff --git a/protobuf.spec b/protobuf.spec
index 5b75a3a..c8dffbe 100644
--- a/protobuf.spec
+++ b/protobuf.spec
@@ -1,19 +1,21 @@
 Name:          protobuf
-Version:       3.16.0
-Release:       1mamba
+Version:       3.17.0
+Release:       2mamba
 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:           https://code.google.com/p/protobuf/
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/google/protobuf
 Source:        https://github.com/google/protobuf.git/v%{version}/protobuf-%{version}.tar.bz2
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libgcc
+BuildRequires: libpython3-devel
 BuildRequires: libstdc++6-devel
 BuildRequires: libz-devel
+BuildRequires: python3.7dist(six)
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 
@@ -32,8 +34,9 @@ This package contains shared libraries for %{name}.
 Summary:       Devel package for %{name}
 Group:         Development/Libraries
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      protobuf-devel
-Obsoletes:     protobuf-devel
+Obsoletes:     protobuf-devel < 3.17.0
 
 %description -n lib%{name}-devel
 This package contains static libraries and header files needed for development of Protocol Buffer
@@ -75,7 +78,7 @@ cd python
    --install-lib=%{python3_sitearch} \
    --record=%{name}.filelist
 
-sed -i "s,.*/man/.*,&.gz," %{name}.filelist
+sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
 
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -107,8 +110,16 @@ sed -i "s,.*/man/.*,&.gz," %{name}.filelist
 
 %files -n python-%{name} -f python/%{name}.filelist
 %defattr(-,root,root)
+%dir %{python3_sitearch}/protobuf-%{version}-py*.egg-info
+%{python3_sitearch}/protobuf-%{version}-py*.egg-info/*
 
 %changelog
+* Sat May 15 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 3.17.0-2mamba
+- libprotobuf-devel: require protobuf; python-protobuf: use distdeps; fixed url
+
+* Fri May 14 2021 Automatic Build System <autodist@mambasoft.it> 3.17.0-1mamba
+- automatic version update by autodist
+
 * Sun May 09 2021 Automatic Build System <autodist@mambasoft.it> 3.16.0-1mamba
 - automatic version update by autodist