diff --git a/ci/azure/macos_arm64_script b/ci/azure/macos_arm64_script
index 8427d07512838e7634c63f12e73670e1c1678c32..e7aa45b28188a535fe20994da91c8d2a5de8eeb3 100755
--- a/ci/azure/macos_arm64_script
+++ b/ci/azure/macos_arm64_script
@@ -3,7 +3,7 @@
 set -x
 set -e
 
-brew install s3cmd ninja gnu-tar
+brew update && brew install s3cmd ninja gnu-tar
 
 ZIGDIR="$(pwd)"
 ARCH="aarch64"
diff --git a/ci/azure/macos_script b/ci/azure/macos_script
index b83f9c940b71689a42318cb8bcb4883aa2d81689..d47575acc0a95988cbf394e28c1ee7676b0da6cb 100755
--- a/ci/azure/macos_script
+++ b/ci/azure/macos_script
@@ -3,7 +3,7 @@
 set -x
 set -e
 
-brew install s3cmd
+brew update && brew install s3cmd
 
 ZIGDIR="$(pwd)"
 ARCH="x86_64"