diff --git a/roomserver/version/version.go b/roomserver/version/version.go
index 29cc2f8c9..e60b5ef7a 100644
--- a/roomserver/version/version.go
+++ b/roomserver/version/version.go
@@ -44,11 +44,11 @@ var roomVersions = map[gomatrixserverlib.RoomVersion]RoomVersionDescription{
 	},
 	gomatrixserverlib.RoomVersionV3: RoomVersionDescription{
 		Supported: true,
-		Stable:    false,
+		Stable:    true,
 	},
 	gomatrixserverlib.RoomVersionV4: RoomVersionDescription{
 		Supported: true,
-		Stable:    false,
+		Stable:    true,
 	},
 	gomatrixserverlib.RoomVersionV5: RoomVersionDescription{
 		Supported: false,