diff --git a/playbooks/rdiff-backup.yml b/playbooks/rdiff-backup.yml
index 7e9046ea81..9accda60b1 100644
--- a/playbooks/rdiff-backup.yml
+++ b/playbooks/rdiff-backup.yml
@@ -7,7 +7,7 @@
   hosts: backup_clients
   user: root
   gather_facts: False
-  serial: 5
+  serial: 10
   # host_backup_targets set in host_vars or group_vars
   # global_backup_targets can be defined in vars, group_vars/all or anywhere
   # take the 'echo' out below for it to actually run