diff --git a/serd.spec b/serd.spec
index 2b7da1c..f2dd898 100644
--- a/serd.spec
+++ b/serd.spec
@@ -1,19 +1,18 @@
 Name:          serd
-Version:       0.30.10
+Version:       0.30.12
 Release:       1mamba
 Summary:       A lightweight C library for RDF syntax which supports reading and writing Turtle and NTriples
 Group:         Applications/Multimedia
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://drobilla.net/software/serd/
-Source:        http://download.drobilla.net/serd-%{version}.tar.bz2
+URL:           https://www.drobilla.net/software/serd.html
+Source:        https://download.drobilla.net/serd-%{version}.tar.bz2
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Serd is a lightweight C library for RDF syntax which supports reading and writing Turtle and NTriples.
@@ -30,8 +29,7 @@ This package contains shared libraries for %{name}.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-## note: you can add this requirement if .pc files are provided by this package
-#Requires:      pkg-config
+Requires:      pkg-config
 
 %description -n lib%{name}-devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -79,6 +77,9 @@ This package contains libraries and header files for developing applications tha
 %doc NEWS
 
 %changelog
+* Thu Jun 02 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.30.12-1mamba
+- update to 0.30.12
+
 * Fri Jan 22 2021 Automatic Build System <autodist@mambasoft.it> 0.30.10-1mamba
 - automatic version update by autodist