diff --git a/roles/batcave/files/vmdiff.sh b/roles/batcave/files/vmdiff.sh
index 6050b99b41..74ebcbffed 100755
--- a/roles/batcave/files/vmdiff.sh
+++ b/roles/batcave/files/vmdiff.sh
@@ -5,7 +5,7 @@ diffout=$(mktemp tmp.XXXXXXXXX)
 mailto='admin@fedoraproject.org'
 source /root/sshagent >>/dev/null
 export ANSIBLE_HOST_KEY_CHECKING=False
-/srv/web/infra/ansible/scripts/list-vms-per-host virtservers 2>/dev/null  > "$output"
+timeout 1h /srv/web/infra/ansible/scripts/list-vms-per-host virtservers 2>/dev/null  > "$output"
 chmod 644 "$output"
 diff -u "$dest" "$output" > $diffout
 rc=$?