diff --git a/.gitignore b/.gitignore
index 12d1a6c..ce9b1da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-SOURCES/lit-14.0.6.tar.gz
+SOURCES/lit-18.1.8.tar.gz
diff --git a/.python-lit.metadata b/.python-lit.metadata
index 78c2b3d..505459b 100644
--- a/.python-lit.metadata
+++ b/.python-lit.metadata
@@ -1 +1 @@
-9609d2eb844ab6336b26e159e45d3276436d6c72 SOURCES/lit-14.0.6.tar.gz
+ce25d4b0b089e4751192d20c2e94421f1cd6ccd0 SOURCES/lit-18.1.8.tar.gz
diff --git a/SPECS/python-lit.spec b/SPECS/python-lit.spec
index 6a36ea8..c3fbe2a 100644
--- a/SPECS/python-lit.spec
+++ b/SPECS/python-lit.spec
@@ -1,18 +1,39 @@
-%global lit_version 14.0.6
-#global rc_ver 1
-#%%global post_ver 1
+%bcond_with snapshot_build
+
+%if %{with snapshot_build}
+# Unlock LLVM Snapshot LUA functions
+%{llvm_sb_verbose}
+%{llvm_sb}
+%endif
+
+%global lit_version 18.1.8
+#global rc_ver 4
+#global post_ver 0
+
+%global python_lit_srcdir %{srcname}-%{version}%{?rc_ver:rc%{rc_ver}}%{?post_ver:.post%{post_ver}}
+
+%if %{with snapshot_build}
+%undefine rc_ver
+%global lit_version %{llvm_snapshot_version}
+%global python_lit_srcdir llvm-%{lit_version}.src/utils/lit
+%endif
 
 %bcond_without check
 
 Name: python-lit
-Version: %{lit_version}%{?rc_ver:~rc%{rc_ver}}
+Version: %{lit_version}%{?rc_ver:~rc%{rc_ver}}%{?llvm_snapshot_version_suffix:~%{llvm_snapshot_version_suffix}}
 Release: 1%{?dist}
 BuildArch: noarch
 
 License: NCSA
 Summary: Tool for executing llvm test suites
 URL: https://pypi.python.org/pypi/lit
+%if %{without snapshot_build}
 Source0: %{pypi_source lit %{lit_version}%{?rc_ver:rc%{rc_ver}}%{?post_ver:.post%{post_ver}}}
+%else
+Source0:  %{llvm_snapshot_source_prefix}llvm-%{llvm_snapshot_yyyymmdd}.src.tar.xz
+%{llvm_snapshot_extra_source_tags}
+%endif
 
 # for file check
 %if %{with check}
@@ -28,12 +49,17 @@ lit is a tool used by the LLVM project for executing its test suites.
 Summary: LLVM lit test runner for Python 3
 
 Requires: python3-setuptools
+Recommends: python3-psutil
 
 %description -n python3-lit
 lit is a tool used by the LLVM project for executing its test suites.
 
 %prep
+%if %{with snapshot_build}
+%autosetup -n %{python_lit_srcdir} -p4
+%else
 %autosetup -n lit-%{lit_version}%{?rc_ver:rc%{rc_ver}}%{?post_ver:.post%{post_ver}} -p4
+%endif
 
 %build
 %py3_build
@@ -44,18 +70,42 @@ lit is a tool used by the LLVM project for executing its test suites.
 # Strip out #!/usr/bin/env python
 sed -i -e '1{\@^#!/usr/bin/env python@d}' %{buildroot}%{python3_sitelib}/lit/*.py
 
-%if %{with check}
+%if %{with check} && %{without snapshot_build}
 %check
-%{__python3} lit.py tests
+%{__python3} lit.py -v tests
 %endif
 
 %files -n python3-lit
 %license LICENSE.TXT
-%doc README.txt
+%doc README.rst
 %{python3_sitelib}/*
 %{_bindir}/lit
 
 %changelog
+* Tue Jul 09 2024 Tom Stellard <tstellar@redhat.com> - 18.1.8-1
+- 18.1.8 Release
+
+* Thu Mar 21 2024 Tom Stellard <tstellar@redhat.com> - 18.1.2-1
+- 18.1.2 Release
+
+* Wed Nov 29 2023 Nikita Popov <npopov@redhat.com> - 17.0.6-1
+- Update to LLVM 17.0.6
+
+* Wed Oct 04 2023 Nikita Popov <npopov@redhat.com> - 17.0.2-1
+- Update to LLVM 17.0.2
+
+* Sat Jun 17 2023 Tom Stellard <tstellar@redhat.com> - 16.0.6-1
+- 16.0.6 Release
+
+* Thu Apr 27 2023 Tom Stellard <tstellar@redhat.com> - 16.0.0-1
+- 16.0.0 Release
+
+* Thu Jan 19 2023 Tom Stellard <tstellar@redhat.com> - 15.0.7-1
+- Update to lit 15.0.7
+
+* Tue Sep 06 2022 Nikita Popov <npopov@redhat.com> - 15.0.0-1
+- Update to lit 15.0.0
+
 * Mon Jun 27 2022 Tom Stellard <tstellar@redhat.com> - 14.0.6-1
 - Update to 14.0.6