diff --git a/README.md b/README.md
index c4fa663..32518a9 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,4 @@
 # lrzip
 
-lrzip is a compression program optimised for large files. The larger the file
-and the more memory you have, the better the compression advantage this will
-provide, especially once the files are larger than 100MB. The advantage can
-be chosen to be either size (much smaller than bzip2) or speed (much faster
-than bzip2).
+lrzip is a compression program optimised for large files. The larger the file and the more memory you have, the better the compression advantage this will provide, especially once the files are larger than 100MB. The advantage can be chosen to be either size (much smaller than bzip2) or speed (much faster than bzip2).
 
diff --git a/lrzip.spec b/lrzip.spec
index f72ced0..3848ed4 100644
--- a/lrzip.spec
+++ b/lrzip.spec
@@ -1,5 +1,5 @@
 Name:          lrzip
-Version:       0.616
+Version:       0.620
 Release:       1mamba
 Summary:       is a compression program optimised for large files
 Group:         Applications/Archiving
@@ -12,14 +12,27 @@ License:       GPL
 ## AUTOBUILDREQ-BEGIN
 ## note: run 'autospec -u -a6 lrzip' to get the list of build requirements.
 ## AUTOBUILDREQ-END
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
-lrzip is a compression program optimised for large files. The larger the file
-and the more memory you have, the better the compression advantage this will
-provide, especially once the files are larger than 100MB. The advantage can
-be chosen to be either size (much smaller than bzip2) or speed (much faster
-than bzip2).
+lrzip is a compression program optimised for large files. The larger the file and the more memory you have, the better the compression advantage this will provide, especially once the files are larger than 100MB. The advantage can be chosen to be either size (much smaller than bzip2) or speed (much faster than bzip2).
+
+%package -n lib%{name}
+Group:         System/Libraries
+Summary:       Shared libraries for %{name}
+
+%description -n lib%{name}
+This package contains shared libraries for %{name}.
+
+%package -n lib%{name}-devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      pkg-config
+
+%description -n lib%{name}-devel
+This package contains libraries and header files for developing applications that use %{name}.
 
 %debug_package
 
@@ -44,32 +57,27 @@ than bzip2).
 %{_bindir}/lrzip
 %{_bindir}/lrztar
 %{_bindir}/lrzuntar
+%{_mandir}/man*/*.gz
+
+%files -n lib%{name}
+%defattr(-,root,root)
+%{_libdir}/liblrzip.so.*
+%doc AUTHORS COPYING
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
 %{_includedir}/Lrzip.h
 %{_libdir}/liblrzip.a
 %{_libdir}/liblrzip.la
 %{_libdir}/liblrzip.so
-%{_libdir}/liblrzip.so.0
-%{_libdir}/liblrzip.so.0.0.0
 %{_libdir}/pkgconfig/lrzip.pc
-%{_docdir}/lrzip/AUTHORS
-%{_docdir}/lrzip/BUGS
-%{_docdir}/lrzip/COPYING
-%{_docdir}/lrzip/ChangeLog
-%{_docdir}/lrzip/README
-%{_docdir}/lrzip/README-NOT-BACKWARD-COMPATIBLE
-%{_docdir}/lrzip/README.Assembler
-%{_docdir}/lrzip/README.benchmarks
-%{_docdir}/lrzip/TODO
-%{_docdir}/lrzip/WHATS-NEW
-%{_docdir}/lrzip/lrzip.conf.example
-%{_docdir}/lrzip/*.txt
-%{_docdir}/lrzip/lzma/*.txt
-%{_docdir}/lrzip/lzma/README
-%{_docdir}/lrzip/lzma/README-Alloc
-%{_mandir}/man*/*.gz
-%doc AUTHORS COPYING
+%dir %{_docdir}/lrzip
+%{_docdir}/lrzip/*
 
 %changelog
+* Mon Mar 09 2015 Automatic Build System <autodist@mambasoft.it> 0.620-1mamba
+- automatic version update by autodist
+
 * Mon Sep 09 2013 Automatic Build System <autodist@mambasoft.it> 0.616-1mamba
 - automatic version update by autodist