diff --git a/ci/azure/macos_arm64_script b/ci/azure/macos_arm64_script
index b8d1437e78..835ee59c90 100755
--- a/ci/azure/macos_arm64_script
+++ b/ci/azure/macos_arm64_script
@@ -10,7 +10,7 @@ ZIGDIR="$(pwd)"
 HOST_ARCH="x86_64"
 HOST_TARGET="$HOST_ARCH-macos-gnu"
 HOST_MCPU="baseline"
-HOST_CACHE_BASENAME="zig+llvm+lld+clang-$HOST_TARGET-0.9.0-dev.1249+210ef5af8"
+HOST_CACHE_BASENAME="zig+llvm+lld+clang-$HOST_TARGET-0.9.1-dev.90+d2398cf00"
 HOST_PREFIX="$HOME/$HOST_CACHE_BASENAME"
 
 ARCH="aarch64"