diff --git a/drpm.spec b/drpm.spec
index a2cd680..f22d8bf 100644
--- a/drpm.spec
+++ b/drpm.spec
@@ -1,6 +1,6 @@
 Name:          drpm
 Version:       0.5.0
-Release:       1mamba
+Release:       2mamba
 Summary:       A library for making, reading and applying deltarpm packages
 Group:         System/Management
 Vendor:        openmamba
@@ -20,9 +20,9 @@ BuildRequires: librpm-devel
 BuildRequires: libz-devel
 BuildRequires: libzstd-devel
 ## AUTOBUILDREQ-END
+BuildRequires: librpm-devel >= 4.16.1.2-1mamba
 BuildRequires: cmake
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 A library for making, reading and applying deltarpm packages.
@@ -76,5 +76,8 @@ This package contains libraries and header files for developing applications tha
 %{_libdir}/pkgconfig/drpm.pc
 
 %changelog
+* Sun Mar 07 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.0-2mamba
+- rebuilt by autoport with build requirements: librpm-devel>=4.16.1.2-1mamba
+
 * Sat Sep 12 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.0-1mamba
 - package created using the webbuild interface