diff --git a/build.sh b/build.sh
index eefacf7..dde1684 100755
--- a/build.sh
+++ b/build.sh
@@ -34,7 +34,7 @@ fi
 # Convert Shader
 shader="${script_dir}/convert.comp.glsl"
 shader_compiler="glslc"
-shader_flags="--target-spv=spv1.5 -std=460 --target-env=vulkan1.3"
+shader_flags="--target-spv=spv1.4 -std=460 -O --target-env=vulkan1.2"
 shader_out="-o${build}/"
 shader_stage="-fshader-stage=comp"