diff --git a/roominfotree/maxroomversion.go b/roominfotree/maxroomversion.go
index ad1ffce..d90de82 100644
--- a/roominfotree/maxroomversion.go
+++ b/roominfotree/maxroomversion.go
@@ -84,11 +84,18 @@ func getMaxRoomVersion(serverVersionInfo fclient.Version) string {
 		// https://continuwuity.org/
 		// https://forgejo.ellis.link/continuwuation/continuwuity
 
+		switch {
+		// v12 support in "v0.5.0-rc.8".
+		// https://forgejo.ellis.link/continuwuation/continuwuity/releases/tag/v0.5.0-rc.8
+		case serverVersion.GreaterThanOrEqual(version.Must(version.NewVersion("0.5.0-rc.8"))):
+			return "v12"
 		// First version named "continuwuity":
 		// https://forgejo.ellis.link/continuwuation/continuwuity/commit/dc599db19c48ad3cbae15fc419c4a531d217ed05
 		// v11 support at first version named "continuwuity":
 		// https://forgejo.ellis.link/continuwuation/continuwuity/src/commit/dc599db19c48ad3cbae15fc419c4a531d217ed05/src/core/info/room_version.rs
-		return "v11"
+		default:
+			return "v11"
+		}
 	case "Dendrite":
 		// https://github.com/element-hq/dendrite
 		// https://element-hq.github.io/dendrite/