diff --git a/.gitea/workflows/stale.yml b/.gitea/workflows/stale.yml
deleted file mode 100644
index 7ba5af9..0000000
--- a/.gitea/workflows/stale.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-name: "Close stale issues and PRs"
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "@hourly"
-
-jobs:
-  stale:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/stale@v9
-        with:
-          stale-pr-message: "Will be closed in x days bc yo mom is a bitch. im not telling you when it will be closed fuckface"
-          days-before-pr-stale: 2
-          days-before-pr-close: 3
diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
index 4f22c9d..c9f57d7 100644
--- a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
+++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
@@ -4,6 +4,8 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 import de.szut.casino.user.UserEntity;
 import jakarta.persistence.*;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Positive;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
diff --git a/backend/src/main/java/de/szut/casino/dice/DiceDto.java b/backend/src/main/java/de/szut/casino/dice/DiceDto.java
index f0caf48..ecbf3d7 100644
--- a/backend/src/main/java/de/szut/casino/dice/DiceDto.java
+++ b/backend/src/main/java/de/szut/casino/dice/DiceDto.java
@@ -5,14 +5,12 @@ import jakarta.validation.constraints.DecimalMax;
 import jakarta.validation.constraints.DecimalMin;
 import jakarta.validation.constraints.NotNull;
 import lombok.Getter;
-import lombok.NoArgsConstructor;
 import lombok.Setter;
 
 import java.math.BigDecimal;
 
 @Getter
 @Setter
-@NoArgsConstructor
 public class DiceDto extends BetDto {
     private boolean rollOver;
 
diff --git a/backend/src/main/java/de/szut/casino/dice/DiceService.java b/backend/src/main/java/de/szut/casino/dice/DiceService.java
index 836620b..71e4584 100644
--- a/backend/src/main/java/de/szut/casino/dice/DiceService.java
+++ b/backend/src/main/java/de/szut/casino/dice/DiceService.java
@@ -11,11 +11,10 @@ import java.util.Random;
 @Service
 public class DiceService {
     private static final int MAX_DICE_VALUE = 100;
-    private final Random random;
+    private final Random random = new Random();
     private final BalanceService balanceService;
 
-    public DiceService(Random random, BalanceService balanceService) {
-        this.random = random;
+    public DiceService(BalanceService balanceService) {
         this.balanceService = balanceService;
     }
 
diff --git a/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java b/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java
deleted file mode 100644
index 6b2e230..0000000
--- a/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java
+++ /dev/null
@@ -1,251 +0,0 @@
-package de.szut.casino.dice;
-
-import de.szut.casino.shared.service.BalanceService;
-import de.szut.casino.user.UserEntity;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
-import org.mockito.InjectMocks;
-import org.mockito.Mock;
-import org.mockito.junit.jupiter.MockitoExtension;
-
-import java.math.BigDecimal;
-import java.math.RoundingMode;
-import java.util.Random;
-
-import static org.junit.jupiter.api.Assertions.*;
-import static org.mockito.Mockito.*;
-
-@ExtendWith(MockitoExtension.class)
-class DiceServiceTest {
-
-    @Mock
-    private BalanceService balanceService;
-
-    @Mock
-    private Random random;
-
-    @InjectMocks
-    private DiceService diceService;
-
-    private UserEntity user;
-    private DiceDto diceDto;
-
-    @BeforeEach
-    void setUp() {
-        user = new UserEntity();
-        user.setId(1L);
-        user.setBalance(BigDecimal.valueOf(1000));
-
-        diceDto = new DiceDto();
-        diceDto.setBetAmount(BigDecimal.valueOf(10));
-        diceDto.setTargetValue(BigDecimal.valueOf(50));
-        diceDto.setRollOver(true);
-    }
-
-    @Test
-    void play_rollOver_win() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(50));
-        when(random.nextInt(anyInt())).thenReturn(55);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(56), result.getRolledValue());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollOver_lose() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(50));
-        when(random.nextInt(anyInt())).thenReturn(49);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.valueOf(50), result.getRolledValue());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollUnder_win() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(50));
-        when(random.nextInt(anyInt())).thenReturn(48);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(49), result.getRolledValue());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollUnder_lose() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(50));
-        when(random.nextInt(anyInt())).thenReturn(50);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.valueOf(51), result.getRolledValue());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollOver_targetValueOne_rolledOne_lose() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(1));
-        when(random.nextInt(anyInt())).thenReturn(0);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.valueOf(1), result.getRolledValue());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollOver_targetValueOne_rolledTwo_win() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(1));
-        when(random.nextInt(anyInt())).thenReturn(1);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(2), result.getRolledValue());
-        // Win chance for target 1 (roll over) is 99. Multiplier = (100-1)/99 = 1
-        assertEquals(diceDto.getBetAmount().stripTrailingZeros(), result.getPayout().stripTrailingZeros());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollUnder_targetValueOne_alwaysLose_winChanceZero() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(1));
-        when(random.nextInt(anyInt())).thenReturn(0);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.valueOf(1), result.getRolledValue());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollOver_targetValueNinetyNine_rolledHundred_win() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(99));
-        when(random.nextInt(anyInt())).thenReturn(99);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(100), result.getRolledValue());
-        // Win chance for target 99 (roll over) is 1. Multiplier = (100-1)/1 = 99
-        assertEquals(diceDto.getBetAmount().multiply(BigDecimal.valueOf(99)).stripTrailingZeros(), result.getPayout().stripTrailingZeros());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollUnder_targetValueNinetyNine_rolledNinetyEight_win() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(99));
-        when(random.nextInt(anyInt())).thenReturn(97);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(98), result.getRolledValue());
-        // Win chance for target 99 (roll under) is 98. Multiplier = (100-1)/98 = 99/98
-        assertEquals(diceDto.getBetAmount().multiply(BigDecimal.valueOf(99).divide(BigDecimal.valueOf(98), 4, RoundingMode.HALF_UP)), result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollOver_targetValueOneHundred_alwaysLose_winChanceZero() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(100));
-        when(random.nextInt(anyInt())).thenReturn(99);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.valueOf(100), result.getRolledValue());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_rollUnder_targetValueOneHundred_rolledNinetyNine_win() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(100));
-        when(random.nextInt(anyInt())).thenReturn(98);
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(99), result.getRolledValue());
-        // Win chance for target 100 (roll under) is 99. Multiplier = (100-1)/99 = 1
-        assertEquals(diceDto.getBetAmount().stripTrailingZeros(), result.getPayout().stripTrailingZeros());
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-        verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class));
-    }
-
-    @Test
-    void play_payoutCalculationCorrect() {
-        diceDto.setRollOver(true);
-        diceDto.setTargetValue(BigDecimal.valueOf(75));
-        when(random.nextInt(anyInt())).thenReturn(75);
-
-        // Multiplier for win chance 25: (100-1)/25 = 99/25 = 3.96
-        // Payout: 10 * 3.96 = 39.6
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(39.6).stripTrailingZeros(), result.getPayout().stripTrailingZeros());
-    }
-
-    @Test
-    void play_payoutCalculationCorrect_rollUnder() {
-        diceDto.setRollOver(false);
-        diceDto.setTargetValue(BigDecimal.valueOf(25));
-        when(random.nextInt(anyInt())).thenReturn(0);
-
-        // Multiplier for win chance 24: (100-1)/24 = 99/24 = 4.125
-        // Payout: 10 * 4.125 = 41.25
-
-        DiceResult result = diceService.play(user, diceDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(41.25).stripTrailingZeros(), result.getPayout().stripTrailingZeros());
-    }
-
-    @Test
-    void play_betAmountSubtracted() {
-        when(random.nextInt(anyInt())).thenReturn(50);
-
-        diceService.play(user, diceDto);
-
-        verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount());
-    }
-}