diff --git a/appservice/workers/transaction_scheduler.go b/appservice/workers/transaction_scheduler.go
index cc9907481..6e8e8f4a3 100644
--- a/appservice/workers/transaction_scheduler.go
+++ b/appservice/workers/transaction_scheduler.go
@@ -185,14 +185,14 @@ func createTransaction(
 		}
 	}
 
-	var ev []*gomatrixserverlib.Event
-	for _, e := range events {
-		ev = append(ev, e.Event)
+	var ev []*gomatrixserverlib.HeaderedEvent
+	for i := range events {
+		ev = append(ev, &events[i])
 	}
 
 	// Create a transaction and store the events inside
 	transaction := gomatrixserverlib.ApplicationServiceTransaction{
-		Events: ev,
+		Events: gomatrixserverlib.HeaderedToClientEvents(ev, gomatrixserverlib.FormatAll),
 	}
 
 	transactionJSON, err = json.Marshal(transaction)
diff --git a/go.mod b/go.mod
index 42eeaf04e..d01c80860 100644
--- a/go.mod
+++ b/go.mod
@@ -22,7 +22,7 @@ require (
 	github.com/matrix-org/go-http-js-libp2p v0.0.0-20200518170932-783164aeeda4
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3
 	github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20201116151724-6e7b24e4956c
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20201202134418-2ba106a5bca3
 	github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91
 	github.com/matrix-org/util v0.0.0-20200807132607-55161520e1d4
 	github.com/mattn/go-sqlite3 v1.14.2
diff --git a/go.sum b/go.sum
index 1341894df..18715f86a 100644
--- a/go.sum
+++ b/go.sum
@@ -569,8 +569,8 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
 github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
 github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd h1:xVrqJK3xHREMNjwjljkAUaadalWc0rRbmVuQatzmgwg=
 github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20201116151724-6e7b24e4956c h1:iiloytJig9EmlKwuSulIbNvoPz1BFZ1QdyPWpuy85XM=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20201116151724-6e7b24e4956c/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20201202134418-2ba106a5bca3 h1:+45Q/5FybBhHPMr10YdzJNFYO/6RRgkBcZbMzIRq5Ck=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20201202134418-2ba106a5bca3/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
 github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91 h1:HJ6U3S3ljJqNffYMcIeAncp5qT/i+ZMiJ2JC2F0aXP4=
 github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91/go.mod h1:sjyPyRxKM5uw1nD2cJ6O2OxI6GOqyVBfNXqKjBZTBZE=
 github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7 h1:ntrLa/8xVzeSs8vHFHK25k0C+NV74sYMJnNSg5NoSRo=
diff --git a/syncapi/types/types.go b/syncapi/types/types.go
index 91d33d4a6..36f30c20b 100644
--- a/syncapi/types/types.go
+++ b/syncapi/types/types.go
@@ -484,8 +484,7 @@ func NewInviteResponse(event *gomatrixserverlib.HeaderedEvent) *InviteResponse {
 
 	// Then we'll see if we can create a partial of the invite event itself.
 	// This is needed for clients to work out *who* sent the invite.
-	format, _ := event.RoomVersion.EventFormat()
-	inviteEvent := gomatrixserverlib.ToClientEvent(event.Unwrap(), format)
+	inviteEvent := gomatrixserverlib.ToClientEvent(event.Unwrap(), gomatrixserverlib.FormatSync)
 	inviteEvent.Unsigned = nil
 	if ev, err := json.Marshal(inviteEvent); err == nil {
 		res.InviteState.Events = append(res.InviteState.Events, ev)