diff --git a/movie_manager/serializers.py b/movie_manager/serializers.py
index 07cc417..dc3cff1 100644
--- a/movie_manager/serializers.py
+++ b/movie_manager/serializers.py
@@ -26,26 +26,19 @@ class MovieSerializer(serializers.ModelSerializer):
         ]
 
     def get_has_been_scheduled(self, obj):
-        return Showing.objects.filter(movie_id=obj.id).exists()
+        return len(Showing.objects.filter(movie_id=obj.id).all()) > 0
 
 
 class MovieListSerializer(serializers.ModelSerializer):
     movie_count = serializers.SerializerMethodField()
     movies = MovieSerializer(read_only=True, many=True)
-    serializer_class = MovieSerializer
-
-    def get_queryset(self):
-        return MovieList.objects.prefetch_related(
-            "movies",
-            "movies__showing_set"
-        )
 
     class Meta:
         model = MovieList
         fields = ["id", "name", "owner", "public", "movies", "movie_count"]
 
     def get_movie_count(self, obj):
-        return obj.movies.count()
+        return len(obj.movies.all())
 
 
 class UserSerializer(serializers.Serializer):
diff --git a/movie_manager/views.py b/movie_manager/views.py
index 0a3dbe9..7c5c1e9 100644
--- a/movie_manager/views.py
+++ b/movie_manager/views.py
@@ -55,7 +55,7 @@ class MovieViewset(viewsets.ModelViewSet):
 
 
 class MovieListViewset(viewsets.ModelViewSet):
-    queryset = MovieList.objects.prefetch_related("movies").order_by("name")
+    queryset = MovieList.objects.all().order_by("name")
     authentication_classes = [TokenAuthentication]
     permission_classes = [permissions.IsAuthenticated | ReadOnly]