diff --git a/.ci/build-mac.sh b/.ci/build-mac.sh
index 8e33a09d72..9e16fce4ec 100755
--- a/.ci/build-mac.sh
+++ b/.ci/build-mac.sh
@@ -13,6 +13,7 @@ export HOMEBREW_NO_AUTO_UPDATE=1
 export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
 export HOMEBREW_NO_ENV_HINTS=1
 export HOMEBREW_NO_INSTALL_CLEANUP=1
+brew update
 brew install -f --overwrite --quiet ccache "llvm@$LLVM_COMPILER_VER"
 brew link -f --overwrite --quiet "llvm@$LLVM_COMPILER_VER"
 if [ "$AARCH64" -eq 1 ]; then