diff --git a/cinema/models.py b/cinema/models.py
index 806abe86e..17a29fbca 100644
--- a/cinema/models.py
+++ b/cinema/models.py
@@ -6,7 +6,7 @@ class Movie(models.Model):
     description = models.TextField()
     duration = models.IntegerField()
     genres = models.ManyToManyField("Genre", related_name="movies")
-    actors = models.ManyToManyField("Actor", related_name="actors")
+    actors = models.ManyToManyField("Actor", related_name="movie_actors")
 
     def __str__(self):
         return f"{self.title} {self.actors.count()} actors"
@@ -16,7 +16,7 @@ class Genre(models.Model):
     name = models.CharField(max_length=50, unique=True)
 
     def __str__(self):
-        return {self.name}
+        return self.name
 
 
 class CinemaHall(models.Model):
diff --git a/cinema/serializers.py b/cinema/serializers.py
index b56099e19..2e28993bf 100644
--- a/cinema/serializers.py
+++ b/cinema/serializers.py
@@ -80,9 +80,9 @@ def update(self, instance, validated_data):
             "name",
             instance.name)
 
-        instance.row = validated_data.get(
+        instance.rows = validated_data.get(
             "row",
-            instance.row)
+            instance.rows)
 
         instance.seats_in_row = validated_data.get(
             "seats_in_row",
diff --git a/cinema/urls.py b/cinema/urls.py
index 893609405..954ff79f4 100644
--- a/cinema/urls.py
+++ b/cinema/urls.py
@@ -32,7 +32,7 @@
     path("genres/<int:pk>/",
          GenreDetail.as_view(),
          name="genre-detail"),
-    path("cinema-hall",
+    path("cinema-hall/",
          cinema_hall_list,
          name="cinema_hall_list"),
     path("cinema-hall/<int:pk>/",
diff --git a/cinema/views.py b/cinema/views.py
index bc14fe12b..af4f27dc8 100644
--- a/cinema/views.py
+++ b/cinema/views.py
@@ -89,7 +89,7 @@ def patch(self, request, pk):
         if serializer.is_valid():
             serializer.save()
             return Response(status=status.HTTP_200_OK)
-        return Response(status=status.HTTP_400_BAD_REQUEST)
+        return Response(serializer.data, status=status.HTTP_400_BAD_REQUEST)
 
     def delete(self, request, pk):
         genre = self.get_object(pk)
diff --git a/cinema_service/settings.py b/cinema_service/settings.py
index ab788564e..f41ad94ad 100644
--- a/cinema_service/settings.py
+++ b/cinema_service/settings.py
@@ -92,20 +92,24 @@
 
 AUTH_PASSWORD_VALIDATORS = [
     {
-        "NAME": "django.contrib.auth.password_validation."
-        "UserAttributeSimilarityValidator",
+        "NAME":
+            "django.contrib.auth.password_validation."
+            "UserAttributeSimilarityValidator",
     },
     {
-        "NAME": "django.contrib.auth.password_validation." 
-        "MinimumLengthValidator",
+        "NAME":
+            "django.contrib.auth.password_validation."
+            "MinimumLengthValidator",
     },
     {
-        "NAME": "django.contrib.auth.password_validation." 
-        "CommonPasswordValidator",
+        "NAME":
+            "django.contrib.auth.password_validation."
+            "CommonPasswordValidator",
     },
     {
-        "NAME": "django.contrib.auth.password_validation." 
-        "NumericPasswordValidator",
+        "NAME":
+            "django.contrib.auth.password_validation."
+            "NumericPasswordValidator",
     },
 ]