diff --git a/os/config/README.md b/os/config/README.md
index 62bf252..a1078df 100644
--- a/os/config/README.md
+++ b/os/config/README.md
@@ -13,7 +13,7 @@ For each machine, **one by one** do:
     - Check that Consul is healthy
       - `consul members`
     - Check that Postgres is healthy
-  - Run `ansible-playbook -i production.yml --limit <machine> site.yml`
+  - Run `ansible-playbook -i production.yml --limit <machine> -u <username> site.yml`
   - Run `nomad node drain -enable -force -self`
   - Reboot
   - Run `nomad node drain -self -disable`
diff --git a/os/config/production.yml b/os/config/production.yml
index d31193e..9004701 100644
--- a/os/config/production.yml
+++ b/os/config/production.yml
@@ -3,7 +3,7 @@ cluster_nodes:
     veterini:
       ansible_host: fbx-rennes2.machine.deuxfleurs.fr
       ansible_port: 110
-      ansible_user: root 
+      ansible_become: true
       ipv4: 192.168.1.2
       ipv6: 2a01:e35:2fdc:dbe0::2
       interface: eno1
@@ -14,7 +14,7 @@ cluster_nodes:
     silicareux:
       ansible_host: fbx-rennes2.machine.deuxfleurs.fr 
       ansible_port: 111
-      ansible_user: root 
+      ansible_become: true
       ipv4: 192.168.1.3 
       ipv6: 2a01:e35:2fdc:dbe0::3
       interface: eno1 
@@ -25,7 +25,7 @@ cluster_nodes:
     wonse:
       ansible_host: fbx-rennes2.machine.deuxfleurs.fr
       ansible_port: 112
-      ansible_user: root
+      ansible_become: true
       ipv4: 192.168.1.4
       ipv6: 2a01:e35:2fdc:dbe0::4
       interface: eno1