diff --git a/libzypp-17.27.0.tar.bz2 b/libzypp-17.27.0.tar.bz2
index 2999cd1..7977bc8 100644
--- a/libzypp-17.27.0.tar.bz2
+++ b/libzypp-17.27.0.tar.bz2
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:23528d54e8d1f1ba7133caba61671709d22b78deb6932db36223a192ad45bfbe
-size 4840774
+oid sha256:b501b8fe690af76f319f65c4312c118b737b4eee1585eb06aadf12ef488d0398
+size 5510439
diff --git a/libzypp.spec b/libzypp.spec
index 278ec1b..fd96b0f 100644
--- a/libzypp.spec
+++ b/libzypp.spec
@@ -30,6 +30,15 @@
 
 %bcond_without mediabackend_tests
 
+# older libsigc versions have a bug that causes a segfault
+# when clearing connections during signal emission
+# see https://bugzilla.gnome.org/show_bug.cgi?id=784550
+%if 0%{?sle_version} < 150200
+%bcond_without sigc_block_workaround
+%else
+%bcond_with sigc_block_workaround
+%endif
+
 Name:           libzypp
 Version:        17.27.0
 Release:        0
@@ -93,6 +102,7 @@ Requires:       libsolv-tools
 
 BuildRequires:  glib2-devel
 BuildRequires:  libsigc++2-devel
+BuildRequires:  protobuf-devel
 
 # required for testsuite
 %if %{with mediabackend_tests}
@@ -247,8 +257,10 @@ cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} \
       -DLIB=%{_lib} \
       -DCMAKE_BUILD_TYPE=Release \
       -DCMAKE_SKIP_RPATH=1 \
+      -DCMAKE_INSTALL_LIBEXECDIR=%{_libexecdir} \
       %{?with_zchunk:-DENABLE_ZCHUNK_COMPRESSION=1} \
       %{?with_zstd:-DENABLE_ZSTD_COMPRESSION=1} \
+      %{?with_sigc_block_workaround:-DENABLE_SIGC_BLOCK_WORKAROUND=1} \
       %{!?with_mediabackend_tests:-DDISABLE_MEDIABACKEND_TESTS=1} \
       ${EXTRA_CMAKE_OPTIONS} \
       ..
@@ -384,11 +396,15 @@ fi
 %config(noreplace) %{_sysconfdir}/zypp/systemCheck
 %config(noreplace) %{_sysconfdir}/logrotate.d/zypp-history.lr
 %dir               %{_var}/lib/zypp
+%if "%{_libexecdir}" != "%{_prefix}/lib"
+%dir               %{_libexecdir}/zypp
+%endif
 %dir %attr(750,root,root) %{_var}/log/zypp
 %dir               %{_var}/cache/zypp
 %{_prefix}/lib/zypp
 %{_datadir}/zypp
 %{_bindir}/*
+%{_libexecdir}/zypp/zypp-rpm
 %{_libdir}/libzypp*so.*
 %doc %{_mandir}/man1/*.1.*
 %doc %{_mandir}/man5/*.5.*
@@ -396,8 +412,9 @@ fi
 %files devel
 %defattr(-,root,root)
 %{_libdir}/libzypp.so
-%{_includedir}/zypp
 %{_datadir}/cmake/Modules/*
+%{_includedir}/zypp
+%{_includedir}/zypp-core
 %{_libdir}/pkgconfig/libzypp.pc
 
 %files devel-doc