diff --git a/services/pad.libre-service.eu.md b/services/pad.libre-service.eu.md
index a953e91..0872eb8 100644
--- a/services/pad.libre-service.eu.md
+++ b/services/pad.libre-service.eu.md
@@ -78,6 +78,14 @@ Installer :
 apt install nodejs
 ```
 
+### Npm
+
+Etherpad nécessite Npm :
+```
+apt install npm
+```
+
+
 ## Déploiement
 
 ### Préparation de la base de données