diff --git a/puppet/zulip_ops/files/install-ssh-authorized-keys b/puppet/zulip_ops/files/install-ssh-authorized-keys
index 9dd9e3b05f..9e1c48c883 100644
--- a/puppet/zulip_ops/files/install-ssh-authorized-keys
+++ b/puppet/zulip_ops/files/install-ssh-authorized-keys
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -eu
+set -euo pipefail
 
 username="$1"
 ssh_secret_name="$2"