diff --git a/application/src/main/kotlin/tw/waterballsa/gaas/application/usecases/StartGameUseCase.kt b/application/src/main/kotlin/tw/waterballsa/gaas/application/usecases/StartGameUseCase.kt
index 9dcc0f8f..a6f0e921 100644
--- a/application/src/main/kotlin/tw/waterballsa/gaas/application/usecases/StartGameUseCase.kt
+++ b/application/src/main/kotlin/tw/waterballsa/gaas/application/usecases/StartGameUseCase.kt
@@ -68,7 +68,7 @@ class StartGameUseCase(
             throw PlatformException(GAME_START_FAILED, "Room Id is null")
         }
         val gameServerHost = game.backEndUrl
-        val startGameRequest = StartGameRequest(roomId.toString(), players.map { it.toGamePlayer() })
+        val startGameRequest = StartGameRequest(roomId!!.value, players.map { it.toGamePlayer() })
         val startGameResponse = gameService.startGame(gameServerHost, jwtToken, startGameRequest)
 
         return StartedGameEvent(GAME_STARTED, Data(startGameResponse.url, roomId!!))
diff --git a/spring/src/test/kotlin/tw/waterballsa/gaas/spring/it/controllers/RoomControllerTest.kt b/spring/src/test/kotlin/tw/waterballsa/gaas/spring/it/controllers/RoomControllerTest.kt
index 14f5d314..fb2d09be 100644
--- a/spring/src/test/kotlin/tw/waterballsa/gaas/spring/it/controllers/RoomControllerTest.kt
+++ b/spring/src/test/kotlin/tw/waterballsa/gaas/spring/it/controllers/RoomControllerTest.kt
@@ -781,7 +781,7 @@ class RoomControllerTest @Autowired constructor(
         mockMvc.perform(
             post("/rooms/${room.roomId!!.value}:startGame")
                 .withJwt(toJwt())
-                .withJson(StartGameRequest(room.players.map { it.toGamePlayer() }))
+                .withJson(StartGameRequest(room.roomId!!.value,room.players.map { it.toGamePlayer() }))
         )
 
     private fun Player.toGamePlayer(): StartGameRequest.GamePlayer =