diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index a0dc966..6157386 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -15,6 +15,8 @@ PROD_DIR="$HOME/www"
 PHP="$(which php)"
 REPO_URI=$(cat "$DEV_DIR/config.yaml" | grep ^git_repo | head -1 | awk '{print $2}')
 
+[ "$(hostname)" = "4in1" ] || die "unexpected hostname. are you sure you're running it on the right machine?"
+
 git push origin master
 
 [ -d "$STAGING_DIR" ] || mkdir "$STAGING_DIR"