diff --git a/mumble-vm-system.scm b/mumble-vm-system.scm
index 74ff714..cb8568f 100644
--- a/mumble-vm-system.scm
+++ b/mumble-vm-system.scm
@@ -18,6 +18,7 @@
   #:use-module (gnu services admin)
   #:use-module (gnu services certbot)
   #:use-module (gnu services ssh)
+  #:use-module (gnu services telephony)
   #:use-module (gnu services web)
   #:use-module (guix build-system copy)
   #:use-module ((guix licenses) #:prefix license:)
@@ -91,6 +92,20 @@ replicate or contribute to it.")
           (certificate-configuration
            (domains '("audio.experimental.a-lec.org"))
            (deploy-hook %nginx-deploy-hook))))))
+      ;; Mumble
+      (service mumble-server-service-type
+         (mumble-server-configuration
+          (welcome-text
+           "<br />
+Bienvenue sur le service d'audio-conférence de <b>Libre en communs</b>.<br />
+https://audio.experimental.a-lec.org/
+<br />")
+          (cert-required? #t) ;; Disallow text password logins
+          (max-user-bandwidth 100000)
+          (ssl-cert
+           "/etc/letsencrypt/live/audio.experimental.a-lec.org/fullchain.pem")
+          (ssl-key
+           "/etc/letsencrypt/live/audio.experimental.a-lec.org/privkey.pem")))
       ;; Networking
       (service
        static-networking-service-type