diff --git a/ffmpeg.spec b/ffmpeg.spec
index 943a58a..ee9cd27 100644
--- a/ffmpeg.spec
+++ b/ffmpeg.spec
@@ -38,7 +38,6 @@
 %global _with_webp        1
 %global _with_zmq         1
 %else
-# libavfilter has undefined glslang symbols
 %global _without_vulkan   1
 %endif
 %ifarch x86_64
@@ -112,7 +111,7 @@ ExclusiveArch: armv7hnl
 Summary:        Digital VCR and streaming server
 Name:           ffmpeg%{?flavor}
 Version:        5.1.1
-Release:        2%{?date:.%{?date}%{?date:git}%{?rel}}%{?dist}
+Release:        3%{?date:.%{?date}%{?date:git}%{?rel}}%{?dist}
 License:        %{ffmpeg_license}
 URL:            http://ffmpeg.org/
 %if 0%{?date}
@@ -213,7 +212,7 @@ BuildRequires:  texinfo
 %{?_with_vmaf:BuildRequires: libvmaf-devel >= 1.5.2}
 %{?_with_wavpack:BuildRequires: wavpack-devel}
 %{!?_without_vidstab:BuildRequires:  vid.stab-devel}
-%{!?_without_vulkan:BuildRequires:  vulkan-loader-devel glslang-devel >= 11.0}
+%{!?_without_vulkan:BuildRequires:  vulkan-loader-devel pkgconfig(shaderc)}
 %{!?_without_x264:BuildRequires: x264-devel >= 0.0.0-0.31}
 %{!?_without_x265:BuildRequires: x265-devel}
 %{!?_without_xvid:BuildRequires: xvidcore-devel}
@@ -357,7 +356,7 @@ This package contains development files for %{name}
     %{?_with_vmaf:--enable-libvmaf --enable-version3} \\\
     %{?_with_vapoursynth:--enable-vapoursynth} \\\
     %{!?_without_vpx:--enable-libvpx} \\\
-    %{!?_without_vulkan:--enable-vulkan --enable-libglslang} \\\
+    %{!?_without_vulkan:--enable-vulkan --enable-libshaderc} \\\
     %{?_with_webp:--enable-libwebp} \\\
     %{!?_without_x264:--enable-libx264} \\\
     %{!?_without_x265:--enable-libx265} \\\
@@ -518,6 +517,9 @@ mv %{buildroot}%{_libdir}{/%{name},}/pkgconfig
 
 
 %changelog
+* Mon Sep 05 2022 Leigh Scott <leigh123linux@gmail.com> - 5.1.1-3
+- Switch from glslang to shaderc
+
 * Sun Sep 04 2022 Leigh Scott <leigh123linux@gmail.com> - 5.1.1-2
 - move libs to a subdirectory to allow parallel installation with ffmpeg-free