diff --git a/geogame/main/models.py b/geogame/main/models.py
index 7d10d78..7f953ea 100644
--- a/geogame/main/models.py
+++ b/geogame/main/models.py
@@ -80,7 +80,10 @@ class Challenge(models.Model):
     @property
     def average(self):
         #this should be cached, but with low volumes its fine as is
-        return int(round(Game.objects.filter(challenge=self).aggregate(Avg('score')).get('score__avg', 0)))
+        if Game.objects.filter(challenge=self):
+            return int(round(Game.objects.filter(challenge=self).aggregate(Avg('score')).get('score__avg', 0)))
+        else:
+            return 0
         
     @property
     def num_rounds(self):
@@ -148,4 +151,4 @@ class GameRound(models.Model):
                 self.result = 0
             else:
                 self.result = int(round(14.46 * (11.52 - math.log(dst))))
-        super().save(*args, **kwargs)
\ No newline at end of file
+        super().save(*args, **kwargs)
diff --git a/geogame/settings.py b/geogame/settings.py
index 00193d0..b433889 100644
--- a/geogame/settings.py
+++ b/geogame/settings.py
@@ -24,7 +24,7 @@ with open(os.path.join(BASE_DIR, "env_secret_key.txt")) as secret_key:
     SECRET_KEY = secret_key.read().strip()
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = False
 
 ALLOWED_HOSTS = ['*']