--- a/contrib/provision/roles/tram-im/templates/etc/prosody/conf.avail/tram-im.cfg.lua	Sat Apr 16 17:06:55 2016 +0800
+++ b/contrib/provision/roles/tram-im/templates/etc/prosody/conf.avail/tram-im.cfg.lua	Sat Apr 16 17:22:35 2016 +0800
@@ -13,7 +13,12 @@
 	dhparam = "/etc/prosody/dh-2048.pem";
 }
 
-modules_enabled = { "register", "vcard", "bosh" }
+modules_enabled = {
+	"bosh",
+	"register",
+	"vcard",
+	"carbons",
+}
 modules_disabled = { "s2s" }
 
 allow_registration = true