diff --git a/libgphoto2.spec b/libgphoto2.spec
index 23b32b8..361c7eb 100644
--- a/libgphoto2.spec
+++ b/libgphoto2.spec
@@ -1,5 +1,5 @@
 Name:          libgphoto2
-Version:       2.5.27
+Version:       2.5.28
 Release:       1mamba
 Epoch:         1
 Summary:       A portable library to gives access to more than 400 digital cameras
@@ -7,7 +7,7 @@ Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           https://www.gphoto.org
+URL:           http://www.gphoto.org
 Source0:       http://downloads.sourceforge.net/project/gphoto/libgphoto/%{version}/libgphoto2-%{version}.tar.bz2
 Source1:       libgphoto-usbcam
 Patch0:        libgphoto-2.4.6-serial.so_undef_symbol_rsm_unlock_device.patch
@@ -19,26 +19,49 @@ BuildRequires: libX11-devel
 BuildRequires: libXau-devel
 BuildRequires: libXdmcp-devel
 BuildRequires: libXpm-devel
+BuildRequires: libbrotli-devel
+BuildRequires: libbsd-devel
 BuildRequires: libbzip2-devel
-BuildRequires: libdw-devel
+BuildRequires: libcares-devel
+BuildRequires: libcurl-devel
+BuildRequires: libe2fs-devel
 BuildRequires: libexif-devel
 BuildRequires: libexpat-devel
 BuildRequires: libfontconfig-devel
 BuildRequires: libfreetype-devel
 BuildRequires: libgd-devel
+BuildRequires: libglib-devel
+BuildRequires: libgraphite2-devel
+BuildRequires: libgsasl-devel
+BuildRequires: libgss-devel
+BuildRequires: libharfbuzz-devel
+BuildRequires: libidn-devel
+BuildRequires: libidn2-devel
 BuildRequires: libjbig-devel
 BuildRequires: libjpeg-devel
+BuildRequires: libkrb5-devel
+BuildRequires: liblockdev-devel
 BuildRequires: libltdl-devel
 BuildRequires: liblzma-devel
+BuildRequires: libnghttp2-devel
+BuildRequires: libntlm-devel
+BuildRequires: libopenldap-devel
+BuildRequires: libopenssl-devel
+BuildRequires: libpcre-devel
 BuildRequires: libpng-devel
+BuildRequires: libpsl-devel
+BuildRequires: librtmp-devel
+BuildRequires: libsasl2-devel
+BuildRequires: libssh2-devel
 BuildRequires: libtiff-devel
 BuildRequires: libudev-devel
-BuildRequires: libusb-compat-devel
-BuildRequires: libusbx-devel
-BuildRequires: libvpx-devel
+BuildRequires: libunistring-devel
+BuildRequires: libusb-devel
+BuildRequires: libwebp-devel
 BuildRequires: libxcb-devel
 BuildRequires: libxml2-devel
 BuildRequires: libz-devel
+BuildRequires: libzstd-devel
 ## AUTOBUILDREQ-END
 %if "%{stage1}" != "1"
 BuildRequires: avahi-compat-libdns_sd-devel
@@ -47,10 +70,9 @@ BuildRequires: liblockdev >= 1.0.1
 BuildRequires: libpopt-devel >= 4.4.5
 BuildRequires: libuuid-devel
 Provides:      libgphoto
-Obsoletes:     libgphoto
+Obsoletes:     libgphoto < 1:2.5.28
 Requires:      udev >= 103
 Requires:      %{name}-common = %{epoch}:%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Libgphoto2 is the core of gphoto2 software.
@@ -61,13 +83,12 @@ Summary:       Static libraries and headers for %{name}
 Group:         Development/Libraries
 Requires:      %{name} = %{epoch}:%{version}-%{release}
 Provides:      libgphoto-devel
-Obsoletes:     libgphoto-devel
+Obsoletes:     libgphoto-devel < 1:2.5.28
 
 %description devel
 Libgphoto2 is the core of gphoto2 software.
 It is a portable library to gives access to more than 400 digital cameras.
-
-This package contains static libraries and header files need for development.
+This package contains static libraries and header files needed for development.
 
 %package common
 Summary:       Arch independent files for %{name}
@@ -85,6 +106,8 @@ Obsoletes:     libgphoto-apidocs
 %description apidocs
 Libgphoto2 API documentation.
 
+%debug_package
+
 %prep
 %setup -q -n libgphoto2-%{version}
 #%patch0 -p1
@@ -95,31 +118,33 @@ Libgphoto2 API documentation.
    --with-gnu-ld \
    --with-ltdl \
    --with-drivers=all \
-   --with-camlibdir=%{_libdir}/libgphoto2 \
    --without-resmgr \
    --without-hal \
    --enable-static
 
+#   --with-camlibdir=%{_libdir}/libgphoto2 \
+
 #  --with-cdk \  
 #  --without-baudboy \
 #  --without-ttylock \
 #  --without-lockdev
 #  --enable-docs
 
-%make udevscriptdir=/lib/udev/
+%make
+
+#udevscriptdir=/lib/udev/
 
 %install
 [ "%{buildroot}" != / ] && rm -rf %{buildroot}
-%makeinstall udevscriptdir=/lib/udev/
+%makeinstall udevscriptdir=%{_prefix}/lib/udev/
 
-install -d %{buildroot}/lib/udev/rules.d/
-install -d %{buildroot}%{_datadir}/hal/fdi/information/10freedesktop
+install -d %{buildroot}%{_udevrulesdir}
 install -D -m 0755 %{SOURCE1} %{buildroot}%{_sysconfdir}/udev/scripts/usbcam
 
 cd packaging/generic
 ./print-camera-list udev-rules version 136 \
    mode 660 owner root group camera > \
-   %{buildroot}/lib/udev/rules.d/40-libgphoto2.rules
+   %{buildroot}%{_udevrulesdir}/40-libgphoto2.rules
 
 cd ../..
 
@@ -147,10 +172,10 @@ cat *.lang > %{name}.lang
 %files common
 %defattr(-,root,root)
 %{_sysconfdir}/udev/scripts/usbcam
-/lib/udev/rules.d/40-libgphoto2.rules
 %dir %{_datadir}/libgphoto2/%{version}
 %{_datadir}/libgphoto2/%{version}/*
-/lib/udev/check-ptp-camera
+%{_udevrulesdir}/40-libgphoto2.rules
+%{_prefix}/lib/udev/check-ptp-camera
 
 %files devel
 %defattr(-,root,root)
@@ -178,6 +203,9 @@ cat *.lang > %{name}.lang
 %{_datadir}/doc/libgphoto2_port/*
 
 %changelog
+* Sun Jan 09 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 2.5.28-1mamba
+- update to 2.5.28
+
 * Sun Feb 21 2021 Automatic Build System <autodist@mambasoft.it> 2.5.27-1mamba
 - automatic version update by autodist