diff --git a/lobby.events.ts b/lobby.events.ts
index ecbf21a..5f985ee 100644
--- a/lobby.events.ts
+++ b/lobby.events.ts
@@ -11,7 +11,7 @@ export class GameDeleteEvent {
 }
 export class GameJoinEvent {
   type = 'joingame';
-  gameId: number;
+  gameId?: number;
   constructor(
     public player: PlayerResponseDTO,
     game?: Partial<GameResponseDTO>,