diff --git a/go.mod b/go.mod
index 55851fbe6..521c98d70 100644
--- a/go.mod
+++ b/go.mod
@@ -22,7 +22,7 @@ require (
 	github.com/matrix-org/dugong v0.0.0-20210921133753-66e6b1c67e2e
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91
 	github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20230525131408-9e1377a918b6
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20230530160030-2640a7efaaaa
 	github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a
 	github.com/matrix-org/util v0.0.0-20221111132719-399730281e66
 	github.com/mattn/go-sqlite3 v1.14.16
diff --git a/go.sum b/go.sum
index 05e4b7d7c..1d7518fad 100644
--- a/go.sum
+++ b/go.sum
@@ -325,6 +325,8 @@ github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530 h1:kHKxCOLcHH8
 github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
 github.com/matrix-org/gomatrixserverlib v0.0.0-20230525131408-9e1377a918b6 h1:GZJdDQt/IJynQyWpHsYYWQUyCu9Y+asAdwfL7pJNQHU=
 github.com/matrix-org/gomatrixserverlib v0.0.0-20230525131408-9e1377a918b6/go.mod h1:H9V9N3Uqn1bBJqYJNGK1noqtgJTaCEhtTdcH/mp50uU=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20230530160030-2640a7efaaaa h1:m0wWaq2qvMJdYrj5p/mLXV11gbFEKNd6o7C16poSlW0=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20230530160030-2640a7efaaaa/go.mod h1:H9V9N3Uqn1bBJqYJNGK1noqtgJTaCEhtTdcH/mp50uU=
 github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a h1:awrPDf9LEFySxTLKYBMCiObelNx/cBuv/wzllvCCH3A=
 github.com/matrix-org/pinecone v0.11.1-0.20230210171230-8c3b24f2649a/go.mod h1:HchJX9oKMXaT2xYFs0Ha/6Zs06mxLU8k6F1ODnrGkeQ=
 github.com/matrix-org/util v0.0.0-20221111132719-399730281e66 h1:6z4KxomXSIGWqhHcfzExgkH3Z3UkIXry4ibJS4Aqz2Y=
diff --git a/roomserver/api/api.go b/roomserver/api/api.go
index 0627770f5..213e16e5d 100644
--- a/roomserver/api/api.go
+++ b/roomserver/api/api.go
@@ -197,7 +197,6 @@ type UserRoomserverAPI interface {
 }
 
 type FederationRoomserverAPI interface {
-	gomatrixserverlib.LatestStateQuerier
 	InputRoomEventsAPI
 	QueryLatestEventsAndStateAPI
 	QueryBulkStateContentAPI
diff --git a/roomserver/internal/query/query.go b/roomserver/internal/query/query.go
index c81692ce1..effcc90d7 100644
--- a/roomserver/internal/query/query.go
+++ b/roomserver/internal/query/query.go
@@ -55,30 +55,6 @@ func (r *Queryer) QueryLatestEventsAndState(
 	return helpers.QueryLatestEventsAndState(ctx, r.DB, request, response)
 }
 
-func (r *Queryer) LatestState(
-	ctx context.Context, roomID spec.RoomID, userID spec.UserID,
-) ([]gomatrixserverlib.PDU, error) {
-	request := &api.QueryLatestEventsAndStateRequest{
-		RoomID: roomID.String(),
-		StateToFetch: []gomatrixserverlib.StateKeyTuple{
-			{
-				EventType: spec.MRoomMember,
-				StateKey:  userID.String(),
-			},
-		},
-	}
-	response := &api.QueryLatestEventsAndStateResponse{}
-	err := helpers.QueryLatestEventsAndState(ctx, r.DB, request, response)
-	if err != nil {
-		return nil, err
-	}
-	res := make([]gomatrixserverlib.PDU, 0, len(response.StateEvents))
-	for _, ev := range response.StateEvents {
-		res = append(res, ev.PDU)
-	}
-	return res, nil
-}
-
 // QueryStateAfterEvents implements api.RoomserverInternalAPI
 func (r *Queryer) QueryStateAfterEvents(
 	ctx context.Context,