diff --git a/README.md b/README.md
index 7b26b4c..113e311 100644
--- a/README.md
+++ b/README.md
@@ -43,3 +43,10 @@ https://docs.bigbluebutton.org/2.2/install.html#bbb-installsh
 
 ## Connexion LDAP
 utiliser le role `bbb-enable-ldap-LE` dans le fichier playbook_prod.yml pour votre machine
+
+## Modifier l'URL d'une room
+``` sh
+docker exec -it greenlight-v2 bash
+bundle exec rails c
+Room.find_by(uid: "CURRENT_ROOM_ID").update_attribute(:uid, "NEW_CUSTOM_ID")
+```
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