diff --git a/federationapi/routing/invite.go b/federationapi/routing/invite.go
index 0453af40e..6ce100eff 100644
--- a/federationapi/routing/invite.go
+++ b/federationapi/routing/invite.go
@@ -46,7 +46,7 @@ func InviteV2(
 		}
 	}
 	return processInvite(
-		httpReq.Context(), inviteReq.Event(), inviteReq.RoomVersion(), inviteReq.InviteRoomState(), roomID, eventID, cfg, rsAPI, keys,
+		httpReq.Context(), true, inviteReq.Event(), inviteReq.RoomVersion(), inviteReq.InviteRoomState(), roomID, eventID, cfg, rsAPI, keys,
 	)
 }
 
@@ -75,12 +75,13 @@ func InviteV1(
 		util.GetLogger(httpReq.Context()).Warnf("failed to extract stripped state from invite event")
 	}
 	return processInvite(
-		httpReq.Context(), event, roomVer, strippedState, roomID, eventID, cfg, rsAPI, keys,
+		httpReq.Context(), false, event, roomVer, strippedState, roomID, eventID, cfg, rsAPI, keys,
 	)
 }
 
 func processInvite(
 	ctx context.Context,
+	isInviteV2 bool,
 	event gomatrixserverlib.Event,
 	roomVer gomatrixserverlib.RoomVersion,
 	strippedState []gomatrixserverlib.InviteV2StrippedState,
@@ -152,9 +153,16 @@ func processInvite(
 	case nil:
 		// Return the signed event to the originating server, it should then tell
 		// the other servers in the room that we have been invited.
-		return util.JSONResponse{
-			Code: http.StatusOK,
-			JSON: gomatrixserverlib.RespInviteV2{Event: signedEvent},
+		if isInviteV2 {
+			return util.JSONResponse{
+				Code: http.StatusOK,
+				JSON: gomatrixserverlib.RespInviteV2{Event: signedEvent},
+			}
+		} else {
+			return util.JSONResponse{
+				Code: http.StatusOK,
+				JSON: gomatrixserverlib.RespInvite{Event: signedEvent},
+			}
 		}
 	default:
 		util.GetLogger(ctx).WithError(err).Error("api.SendInvite failed")
diff --git a/federationapi/routing/routing.go b/federationapi/routing/routing.go
index 650ef16df..5ea190a17 100644
--- a/federationapi/routing/routing.go
+++ b/federationapi/routing/routing.go
@@ -90,16 +90,10 @@ func Setup(
 					JSON: jsonerror.Forbidden("Forbidden by server ACLs"),
 				}
 			}
-			res := InviteV1(
+			return InviteV1(
 				httpReq, request, vars["roomID"], vars["eventID"],
 				cfg, rsAPI, keys,
 			)
-			return util.JSONResponse{
-				Code: res.Code,
-				JSON: []interface{}{
-					res.Code, res.JSON,
-				},
-			}
 		},
 	)).Methods(http.MethodPut, http.MethodOptions)
 
diff --git a/federationsender/api/api.go b/federationsender/api/api.go
index 051e8e512..9f9c2645c 100644
--- a/federationsender/api/api.go
+++ b/federationsender/api/api.go
@@ -94,7 +94,7 @@ type PerformInviteRequest struct {
 }
 
 type PerformInviteResponse struct {
-	SignedEvent gomatrixserverlib.HeaderedEvent `json:"signed_event"`
+	Event gomatrixserverlib.HeaderedEvent `json:"event"`
 }
 
 type PerformServersAliveRequest struct {
diff --git a/federationsender/internal/perform.go b/federationsender/internal/perform.go
index 44c506267..da8d41a74 100644
--- a/federationsender/internal/perform.go
+++ b/federationsender/internal/perform.go
@@ -329,12 +329,7 @@ func (r *FederationSenderInternalAPI) PerformInvite(
 		return fmt.Errorf("r.federation.SendInviteV2: %w", err)
 	}
 
-	response.SignedEvent = inviteRes.Event.Sign(
-		string(r.cfg.Matrix.ServerName),
-		r.cfg.Matrix.KeyID,
-		r.cfg.Matrix.PrivateKey,
-	).Headered(request.RoomVersion)
-
+	response.Event = inviteRes.Event.Headered(request.RoomVersion)
 	return nil
 }
 
diff --git a/go.mod b/go.mod
index 3dff3dfa6..9d1a80955 100644
--- a/go.mod
+++ b/go.mod
@@ -23,7 +23,7 @@ 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 v0.0.0-20190528120928-7df988a63f26
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20200817095438-5be6e67209c8
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20200817100842-9d02141812f2
 	github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f
 	github.com/matrix-org/util v0.0.0-20200807132607-55161520e1d4
 	github.com/mattn/go-sqlite3 v2.0.2+incompatible
diff --git a/roomserver/internal/perform_invite.go b/roomserver/internal/perform_invite.go
index 9f883a562..2e6bcc8ec 100644
--- a/roomserver/internal/perform_invite.go
+++ b/roomserver/internal/perform_invite.go
@@ -139,7 +139,7 @@ func (r *RoomserverInternalAPI) PerformInvite(
 				log.WithError(err).WithField("event_id", event.EventID()).Error("r.fsAPI.PerformInvite failed")
 				return nil
 			}
-			event = fsRes.SignedEvent
+			event = fsRes.Event
 		}
 	}