diff --git a/README.md b/README.md
index e70b1d9eea7069fc8fb6ccfecf1a5524f4c40f48..a84470f456ebd8e95976f896bda8d1ab715ca5a1 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,8 @@ ssh-copy-id zamok.adm.crans.org
 
 ### Lancer Ansible
 
+Il faut `python3-netaddr` sur sa machine.
+
 Pour tester le playbook `base.yml` :
 ```bash
 ansible-playbook base.yml --check