diff --git a/core/play/models.py b/core/play/models.py
index b4e16f0..bc864c2 100644
--- a/core/play/models.py
+++ b/core/play/models.py
@@ -16,7 +16,7 @@ class QuizGame(models.Model):
 
     def generate_unique_code(self):
         for i in range(10):
-            new_code = ''.join(random.choices(string.ascii_letters + string.digits, k=6))
+            new_code = ''.join(random.choices(string.digits, k=6))
             if not QuizGame.objects.filter(join_code=new_code).exists():
                 return new_code