diff --git a/libomp.spec b/libomp.spec
index 3e51eed..a619cf3 100644
--- a/libomp.spec
+++ b/libomp.spec
@@ -5,17 +5,18 @@
 %{llvm_sb}
 %endif
 
-%global maj_ver 17
-%global libomp_version %{maj_ver}.0.6
-#global rc_ver 4
+%global maj_ver 18
+%global min_ver 1
+%global libomp_version %{maj_ver}.%{min_ver}.0
+%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
@@ -34,7 +35,7 @@
 
 Name: libomp
 Version: %{libomp_version}%{?rc_ver:~rc%{rc_ver}}%{?llvm_snapshot_version_suffix:~%{llvm_snapshot_version_suffix}}
-Release: 3%{?dist}
+Release: 1%{?dist}
 Summary: OpenMP runtime for clang
 
 License: Apache-2.0 WITH LLVM-exception OR NCSA
@@ -68,9 +69,6 @@ BuildRequires: llvm-cmake-utils
 
 Requires: elfutils-libelf%{?isa}
 
-# libomp does not support s390x.
-ExcludeArch: s390x
-
 %description
 OpenMP runtime for clang.
 
@@ -158,6 +156,9 @@ rm -rf %{buildroot}%{_libdir}/libarcher_static.a
 %endif
 
 %changelog
+* 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
 
diff --git a/sources b/sources
index 10a82f6..cbe48a2 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (openmp-17.0.6.src.tar.xz) = 836c48db873e3da64835913c2c1d80efaebdfc7061f153acc7b478ea0d73b9c546a09d70dd1465e3e92684947c4a9cb197886b29cbd42418a778faa56b08cc5e
-SHA512 (openmp-17.0.6.src.tar.xz.sig) = 58fb951620d3494e016f0eeefb1cd28d86eb9ecc7894163ed96e8818573f6ed6b6f58d63884799fd052c943e5a63dec39193039f8499b99a55bfd8316c24a55f
+SHA512 (openmp-18.1.0rc4.src.tar.xz) = f38d21e0774d5d2bbca66eebdc974120052ed1fda727c132b3f879c601a9acae7efc8820b312cbbe8ac952518777768b907a6a07439171d2383c65647f138024
+SHA512 (openmp-18.1.0rc4.src.tar.xz.sig) = 7b0f1bcdccb22f6bd22796e8b2843f9f7e772bbb36a6929196fa7cab3bc274d3fe2be48963a48486d62c42468cec3151fc536a75a1bc6b1bb91b0b127cadddb8