diff --git a/scripts/promote-stable-rc-tarballs b/scripts/promote-stable-rc-tarballs
index 78bd827d..e34365b7 100755
--- a/scripts/promote-stable-rc-tarballs
+++ b/scripts/promote-stable-rc-tarballs
@@ -7,4 +7,4 @@ version=$(node -p -e "require('./package.json').version")
 sha=$(git rev-parse --short HEAD)
 echo "Promoting $version-$sha to channel $channel"
 # 300 = 5 minutes
-yarn promote --version $version --sha $sha --channel $channel --max-age 300
+yarn promote --version $version --sha $sha --channel $channel --max-age 300 --xz