diff --git a/inventory.yml b/inventory.yml
index d9459f3..c1bc095 100644
--- a/inventory.yml
+++ b/inventory.yml
@@ -88,6 +88,14 @@ all:
       server_admin: "admin+platon@netz39.de"
       mac: "b8:27:eb:8f:98:2f"
       gatekeeper_user: pi
+      gatekeeper_sip_registration:  !vault |
+        $ANSIBLE_VAULT;1.1;AES256
+        31306464613437343762323366393132323231306362393762636361353230353632333834663430
+        3133663661396566623664323134353737643039646263320a333434326561383962643739346265
+        61376631393266393737306261393137353364353637623335386663613834373233633264316130
+        3931316365663739380a616334626264376164376165346263353366363234646462383637383034
+        62343231636664623938356233363137383166306232373063306362366265333061623532393066
+        6261613435373465336463376431366164373538376465343031
     radon.n39.eu:
       server_admin: "admin+radon@netz39.de"
     krypton.n39.eu: