diff --git a/libusb.spec b/libusb.spec
index cb532de..2a45598 100644
--- a/libusb.spec
+++ b/libusb.spec
@@ -1,5 +1,5 @@
 Name:          libusb
-Version:       1.0.26
+Version:       1.0.27
 Release:       1mamba
 Summary:       A library that provides generic access to USB devices
 Group:         System/Libraries
@@ -8,11 +8,9 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://sourceforge.net/projects/libusbx/
 Source:        https://github.com/libusb/libusb.git/v%{version}/libusb-%{version}.tar.bz2
-#Source:        http://downloads.sourceforge.net/libusb/libusb-%{version}.tar.bz2
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libatomic-devel
 BuildRequires: libudev-devel
 ## AUTOBUILDREQ-END
 %ifarch x86_64
@@ -20,10 +18,8 @@ Provides:      libusb-1.0.so.2()(64bit)
 %else
 Provides:      libusb-1.0.so.2
 %endif
-#Provides:      libusbx
-Obsoletes:     libusbx
-#Provides:      libusb1
-Obsoletes:     libusb1
+Obsoletes:     libusbx < 1.0.27
+Obsoletes:     libusb1 < 1.0.27
 
 %description
 libusbx is a library that provides generic access to USB devices. As a library, it is meant to be used by developers, to facilitate the development of applications that communicate with USB hardware.
@@ -33,9 +29,9 @@ Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      libusb1-devel
-Obsoletes:     libusb1-devel
+Obsoletes:     libusb1-devel < 1.0.27
 Provides:      libusbx-devel
-Obsoletes:     libusbx-devel
+Obsoletes:     libusbx-devel < 1.0.27
 Requires:      pkg-config
 
 %description devel
@@ -45,9 +41,9 @@ This package contains libraries and header files for developing applications tha
 
 %prep
 %setup -q
+./autogen.sh
 
 %build
-./autogen.sh
 %configure
 %make -j1
 
@@ -73,12 +69,14 @@ ln -sf libusb-1.0.so.0 %{buildroot}%{_libdir}/libusb-1.0.so.2
 %dir %{_includedir}/libusb-1.0
 %{_includedir}/libusb-1.0/libusb.h
 %{_libdir}/libusb-1.0.a
-%{_libdir}/libusb-1.0.la
 %{_libdir}/libusb-1.0.so
 %{_libdir}/pkgconfig/libusb-1.0.pc
 %doc ChangeLog NEWS README TODO
 
 %changelog
+* Fri Feb 02 2024 Automatic Build System <autodist@openmamba.org> 1.0.27-1mamba
+- automatic version update by autodist
+
 * Mon Apr 11 2022 Automatic Build System <autodist@mambasoft.it> 1.0.26-1mamba
 - automatic version update by autodist