diff --git a/services/viso.libre-service.eu.md b/services/viso.libre-service.eu.md
index 36e676a..011517f 100644
--- a/services/viso.libre-service.eu.md
+++ b/services/viso.libre-service.eu.md
@@ -3,6 +3,13 @@ Le service visio.libre-service.eu est un service de vidéo-conférence basé sur
 
 # Intallation
 
+## Prérequis
+
+Installer les paquets pré-requis :
+```
+apt-get install gnupg2
+```
+
 ## Choix du serveur HTTP
 Jitsi est prévu pour fonctionner avec Nginx ou Apache. Choix de Apache lors de l'installation du système Debian.
 
@@ -59,3 +66,35 @@ ping "$(hostname)"
 PING visio.libre-service.eu (145.239.49.4) 56(84) bytes of data.
 64 bytes from visio.libre-service.eu (145.239.49.4): icmp_seq=1 ttl=64 time=0.034 ms
 ```
+
+## Paquets
+Déclarer le dépôt Jitsi :
+```
+curl https://download.jitsi.org/jitsi-key.gpg.key | sh -c 'gpg --dearmor > /usr/share/keyrings/jitsi-keyring.gpg'
+echo 'deb [signed-by=/usr/share/keyrings/jitsi-keyring.gpg] https://download.jitsi.org stable/' | tee /etc/apt/sources.list.d/jitsi-stable.list > /dev/null
+```
+
+Mettre à jour la liste des paquets :
+```
+apt update
+```
+
+Installer les paquets Jitsi :
+```
+apt install jitsi-meet
+```
+
+Répondre aux questions :
+```
+ Configuration de jitsi-videobridge2
+ The value for the hostname that is set in Jitsi Videobridge installation.
+ The hostname of the current installation:  visio.libre-service.eu
+
+ SSL certificate for the Jitsi Meet instance
+ Generate a new self-signed certificate (You will later get a chance to obtain a Let's encrypt certificate)
+ I want to use my own certificate  <-- select this one
+
+ Full local server path to the SSL key file:   /var/lib/dehydrated/certs/visio.libre-service.eu/privkey.pem
+
+ Full local server path to the SSL certificate file:  /var/lib/dehydrated/certs/visio.libre-service.eu/fullchain.pem
+```
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