diff --git a/ansible/files/prosody.cfg.lua b/ansible/files/prosody.cfg.lua
index de9aeeb..8b6ac45 100644
--- a/ansible/files/prosody.cfg.lua
+++ b/ansible/files/prosody.cfg.lua
@@ -250,6 +250,7 @@ Component ("groups."..DOMAIN) "muc"
 		"muc_defaults";
 		"muc_offline_delivery";
 		"snikket_restricted_users";
+		"muc_auto_reserve_nicks";
 	}
 	restrict_room_creation = "local"
 	muc_local_only = { "general@groups."..DOMAIN }
@@ -259,6 +260,10 @@ Component ("groups."..DOMAIN) "muc"
 	muc_room_default_persistent = true
 	muc_room_default_public = false
 
+	-- Enable push notifications for offline group members by default
+	-- (this also requires mod_muc_auto_reserve_nicks in practice)
+	muc_offline_delivery_default = true
+
 	default_mucs = {
 		{
 			jid_node = "general";
diff --git a/ansible/snikket.yml b/ansible/snikket.yml
index 21f53f7..38fd604 100644
--- a/ansible/snikket.yml
+++ b/ansible/snikket.yml
@@ -7,9 +7,9 @@
   vars:
     prosody:
       package: "prosody-trunk"
-      build: "1540"
+      build: "1544"
     prosody_modules:
-      revision: "8bd36bba2292"
+      revision: "eb63890ae8fc"
   tasks:
     - import_tasks: tasks/prosody.yml
     - import_tasks: tasks/supervisor.yml
diff --git a/ansible/tasks/prosody.yml b/ansible/tasks/prosody.yml
index bab6dc7..c404e85 100644
--- a/ansible/tasks/prosody.yml
+++ b/ansible/tasks/prosody.yml
@@ -124,6 +124,7 @@
     - mod_spam_reporting
     - mod_watch_spam_reports
     - mod_isolate_host
+    - mod_muc_auto_reserve_nicks
 
 - name: Enable wanted modules (snikket-modules)
   file: