diff --git a/glslang.spec b/glslang.spec
index a88ce86..f86635a 100644
--- a/glslang.spec
+++ b/glslang.spec
@@ -1,11 +1,11 @@
-%global commit 2651ccaec8170b3257642b3c438f50dc4f181fdd
+%global commit 3bb4c48cd95892a5cfcd63df20fcc47fd51c97a0
 %global shortcommit %(c=%{commit}; echo ${c:0:7})
 %global commit_date 20180205
 %global gitrel .%{commit_date}.git%{shortcommit}
 
 Name:           glslang
 Version:        3.1
-Release:        0.7%{?gitrel}%{?dist}
+Release:        0.8%{?gitrel}%{?dist}
 Summary:        OpenGL and OpenGL ES shader front end and validator
 
 License:        BSD and GPLv3+ and ASL 2.0
@@ -78,6 +78,9 @@ install -pm 0644 build/StandAlone/libglslang-default-resource-limits.a %{buildro
 %{_libdir}/libglslang-default-resource-limits.a
 
 %changelog
+* Mon Apr 23 2018 Leigh Scott <leigh123linux@googlemail.com> - 3.1-0.8.20180205.git3bb4c48
+- Update for vulkan 1.1.73.0
+
 * Wed Mar 07 2018 Adam Williamson <awilliam@redhat.com> - 3.1-0.7.20180205.git2651cca
 - Rebuild to fix GCC 8 mis-compilation
   See https://da.gd/YJVwk ("GCC 8 ABI change on x86_64")
diff --git a/sources b/sources
index 34f782d..3794475 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glslang-2651ccaec8170b3257642b3c438f50dc4f181fdd.tar.gz) = 51f3da28351018d3904fbeb4c0320180240f24ac03417386e993298906f4cdf5671373eebf15d0bb66364e92366f37ecb70ec9b328673eb74845bcb64c510dca
+SHA512 (glslang-3bb4c48cd95892a5cfcd63df20fcc47fd51c97a0.tar.gz) = 0cd0f2b2bbb78dc2ae31dbfc7f092626c90264710e2e67b57dedd21e04be4ff412ca54bf8d6503146966af509ea6ba02e4063326a9dc0994a00a171ac055e9e2