diff --git a/ansible/playbooks/consul-server.yml b/ansible/playbooks/consul-server.yml
index fa79f31..f7e6231 100644
--- a/ansible/playbooks/consul-server.yml
+++ b/ansible/playbooks/consul-server.yml
@@ -1,5 +1,6 @@
 ---
 - hosts: consul_server
+  serial: 1
   roles:
     - role: consul_server
 ...
diff --git a/ansible/playbooks/nomad-server.yml b/ansible/playbooks/nomad-server.yml
index e580b8b..be4862c 100644
--- a/ansible/playbooks/nomad-server.yml
+++ b/ansible/playbooks/nomad-server.yml
@@ -1,5 +1,6 @@
 ---
 - hosts: nomad_server
+  serial: 1
   roles:
     - role: nomad_server
 ...