diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java
index 6e9bf7e..2d1c08b 100644
--- a/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java
+++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java
@@ -24,6 +24,7 @@ public class BlackJackService {
         return blackJackGameRepository.findById(id).orElse(null);
     }
 
+    @Transactional
     public BlackJackGameEntity createBlackJackGame(UserEntity user, BigDecimal betAmount) {
         BlackJackGameEntity game = new BlackJackGameEntity();
         game.setUser(user);