diff --git a/download b/download
index eaeed1d133026213bfd5cb3572d5cceeb04253bd..35ea69e59ed288c2660ab61fd70788297bb8669a 100644
--- a/download
+++ b/download
@@ -1,2 +1,2 @@
-5cc01d151821c546bb4ec6fb03d86c29  openmp-17.0.6.src.tar.xz
-f217faa5a3997253dce0b19931e6b3b9  openmp-17.0.6.src.tar.xz.sig
+5a9b9e1fee1ff5b5b38e49572a3bbe73  openmp-18.1.8.src.tar.xz
+9a042f64f8051954e6e1f7bac6237a6b  openmp-18.1.8.src.tar.xz.sig
diff --git a/libomp.spec b/libomp.spec
index fda8802edf2fb777f5f11342968cbcaeb9161282..b812378d88e07f72883323c07cb3d70d2e682f2a 100644
--- a/libomp.spec
+++ b/libomp.spec
@@ -1,4 +1,3 @@
-%define anolis_release .0.1
 %bcond_with snapshot_build
 
 %if %{with snapshot_build}
@@ -6,19 +5,24 @@
 %{llvm_sb}
 %endif
 
-%global maj_ver 17
-%global libomp_version %{maj_ver}.0.6
+%global maj_ver 18
+%global min_ver 1
+%global libomp_version %{maj_ver}.%{min_ver}.8
 #global rc_ver 4
 %global libomp_srcdir openmp-%{libomp_version}%{?rc_ver:rc%{rc_ver}}.src
-%global so_suffix %{maj_ver}
+%global so_suffix %{maj_ver}.%{min_ver}
 
 %if %{with snapshot_build}
 %undefine rc_ver
 %global maj_ver %{llvm_snapshot_version_major}
 %global libomp_version %{llvm_snapshot_version}
-%global so_suffix %{maj_ver}%{llvm_snapshot_version_suffix}
+%global so_suffix %{maj_ver}.%{min_ver}%{llvm_snapshot_version_suffix}
 %endif
 
+%global libomp_srcdir openmp-%{libomp_version}%{?rc_ver:rc%{rc_ver}}.src
+
+%global toolchain clang
+
 # Opt out of https://fedoraproject.org/wiki/Changes/fno-omit-frame-pointer
 # https://bugzilla.redhat.com/show_bug.cgi?id=2158587
 %undefine _include_frame_pointers
@@ -30,13 +34,12 @@
 %endif
 
 Name: libomp
-Version: %{libomp_version}%{?rc_ver:~rc%{rc_ver}}
-Release: 1%{anolis_release}%{?dist}
+Version: %{libomp_version}%{?rc_ver:~rc%{rc_ver}}%{?llvm_snapshot_version_suffix:~%{llvm_snapshot_version_suffix}}
+Release: 1%{?dist}
 Summary: OpenMP runtime for clang
 
 License: NCSA
 URL: http://openmp.llvm.org
-ExcludeArch: loongarch64
 %if %{with snapshot_build}
 Source0: %{llvm_snapshot_source_prefix}openmp-%{llvm_snapshot_yyyymmdd}.src.tar.xz
 %{llvm_snapshot_extra_source_tags}
@@ -68,11 +71,6 @@ BuildRequires: llvm-cmake-utils
 
 Requires: elfutils-libelf%{?isa}
 
-Obsoletes: libomp-test < 17.0.3
-
-# libomp does not support s390x.
-ExcludeArch: s390x
-
 %description
 OpenMP runtime for clang.
 
@@ -133,14 +131,18 @@ rm -rf %{buildroot}%{_libdir}/libarcher_static.a
 %endif
 %ifnarch %{ix86} %{arm}
 # libomptarget is not supported on 32-bit systems.
+# s390x does not support the offloading plugins.
+%ifnarch s390x
 %{_libdir}/libomptarget.rtl.amdgpu.so.%{so_suffix}
 %{_libdir}/libomptarget.rtl.cuda.so.%{so_suffix}
 %{_libdir}/libomptarget.rtl.%{libomp_arch}.so.%{so_suffix}
+%endif
 %{_libdir}/libomptarget.so.%{so_suffix}
 %endif
 
 %files devel
 %{_prefix}/lib/clang/%{maj_ver}/include/omp.h
+%{_prefix}/lib/clang/%{maj_ver}/include/ompx.h
 %ifnarch %{arm}
 %{_prefix}/lib/clang/%{maj_ver}/include/omp-tools.h
 %{_prefix}/lib/clang/%{maj_ver}/include/ompt.h
@@ -149,9 +151,12 @@ rm -rf %{buildroot}%{_libdir}/libarcher_static.a
 %{_libdir}/cmake/openmp/FindOpenMPTarget.cmake
 %ifnarch %{ix86} %{arm}
 # libomptarget is not supported on 32-bit systems.
+# s390x does not support the offloading plugins.
+%ifnarch s390x
 %{_libdir}/libomptarget.rtl.amdgpu.so
 %{_libdir}/libomptarget.rtl.cuda.so
 %{_libdir}/libomptarget.rtl.%{libomp_arch}.so
+%endif
 %{_libdir}/libomptarget.devicertl.a
 %{_libdir}/libomptarget-amdgpu-*.bc
 %{_libdir}/libomptarget-nvptx-*.bc
@@ -159,8 +164,25 @@ rm -rf %{buildroot}%{_libdir}/libarcher_static.a
 %endif
 
 %changelog
-* Mon Sep 23 2024 Bo Ren <rb01097748@alibaba-inc.com> - 17.0.6-1.0.1
-- Exclude loongarch64
+* Tue Jul 09 2024 Tom Stellard <tstellar@redhat.com> - 18.1.8-1
+- 18.1.8 Release
+
+* Fri Mar 22 2024 Tom Stellard <tstellar@redhat.com> - 18.1.2-1
+- 18.1.2 Release
+
+* Wed Mar 13 2024 Tom Stellard <tstellar@redhat.com> - 18.1.1-1
+- 18.1.1 Release
+
+* Thu Feb 29 2024 Tom Stellard <tstellar@redhat.com> - 18.1.0~rc4-1
+- 18.1.0-rc4 Release
+
+* Thu Jan 25 2024 Fedora Release Engineering <releng@fedoraproject.org> - 17.0.6-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Sun Jan 21 2024 Fedora Release Engineering <releng@fedoraproject.org> - 17.0.6-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+%{?llvm_snapshot_changelog_entry}
 
 * Wed Nov 29 2023 Nikita Popov <npopov@redhat.com> - 17.0.6-1
 - Update to LLVM 17.0.6