diff --git a/services/comms/helmrelease.yaml b/services/comms/helmrelease.yaml
index 4456348..e6536fa 100644
--- a/services/comms/helmrelease.yaml
+++ b/services/comms/helmrelease.yaml
@@ -138,6 +138,8 @@ spec:
       auto_join_rooms:
         - "#othrys:live.bstein.dev"
       autocreate_auto_join_rooms: true
+      experimental:
+        msc4108_enabled: true
       default_room_version: "11"
       experimental_features:
         msc3266_enabled: true