diff --git a/playbooks/host-reboot.yml b/playbooks/host-reboot.yml
index 42a4623f35..8a8a1b110d 100644
--- a/playbooks/host-reboot.yml
+++ b/playbooks/host-reboot.yml
@@ -3,6 +3,7 @@
 - name: reboot hosts
   hosts: $hosts
   user: root
+  serial: 1
 
   tasks:
   - name: see if it needs to be rebooted