diff --git a/xsd.spec b/xsd.spec
index 39cde0d..437b328 100644
--- a/xsd.spec
+++ b/xsd.spec
@@ -1,16 +1,13 @@
-%define minver %(echo %version | cut -d. -f4)
-%define majver %(echo %version | cut -d. -f1-3)
-%define majver2 %(echo %version | cut -d. -f1-2)
 Name:          xsd
-Version:       4.0.0
+Version:       4.1.0
 Release:       1mamba
 Summary:       A W3C XML Schema to C++ translator
 Group:         Development/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://codesynthesis.com/projects/xsd/
-Source:        http://codesynthesis.com/download/xsd/%{majver2}/xsd-%{majver}%{?minver:%minver}+dep.tar.bz2
+URL:           https://www.codesynthesis.com/products/xsd/
+Source:        https://codesynthesis.com/~boris/tmp/xsd/%{version}.a11/xsd-%{version}.a11+dep.tar.bz2
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -20,7 +17,6 @@ BuildRequires: libstdc++6-devel
 BuildRequires: libxerces-c-devel
 ## AUTOBUILDREQ-END
 BuildRequires: build
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 CodeSynthesis XSD is a W3C XML Schema to C++ translator. It generates vocabulary-specific, statically-typed C++ mappings (also called bindings) from XML Schema definitions. XSD supports two C++ mappings: in-memory C++/Tree and event-driven C++/Parser.
@@ -30,7 +26,7 @@ Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      libxsd-devel
-Obsoletes:     libxsd-devel
+Obsoletes:     libxsd-devel < 4.1.0
 
 %description devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -38,10 +34,10 @@ This package contains libraries and header files for developing applications tha
 %debug_package
 
 %prep
-%setup -q -n %{name}-%{majver}%{?minver:%minver}+dep
+%setup -q -n xsd-%{version}.a11+dep
 
 %build
-# FIXME: make files building examples but we don't care at the time
+# FIXME: make fixes building examples but we don't care at the time
 make verbose=1 || true<< _EOF
 _EOF
 
@@ -72,6 +68,9 @@ mv %{buildroot}%{_mandir}/man1/xsd.1 %{buildroot}%{_mandir}/man1/xsdcxx.1
 %doc xsd/NEWS xsd/README
 
 %changelog
+* Wed Mar 31 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1.0-1mamba
+- update to 4.1.0
+
 * Thu Oct 09 2014 Automatic Build System <autodist@mambasoft.it> 4.0.0-1mamba
 - automatic version update by autodist