diff --git a/requirements-rpc.txt b/requirements-rpc.txt
index b164e373..cff5b5ca 100644
--- a/requirements-rpc.txt
+++ b/requirements-rpc.txt
@@ -1,3 +1,3 @@
 # Packages needed for delayed jobs.
-celery[redis]==5.3.1
+celery[redis]==5.3.5
 django-celery-beat~=2.5.0
diff --git a/requirements-test.txt b/requirements-test.txt
index 0aa615e5..9307b2f4 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -3,4 +3,4 @@ coverage~=7.3.2
 fakeldap==0.6.1
 tblib~=1.7.0
 beautifulsoup4~=4.12.2
-httpx~=0.25.0
+httpx~=0.25.1
diff --git a/requirements.txt b/requirements.txt
index e7b03635..c23ee7f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ djangorestframework~=3.14.0
 drf-yasg==1.21.7
 django-filter==23.3
 drf_orjson_renderer==1.7.1
-ormsgpack~=1.4.0
+ormsgpack~=1.4.1
 pyyaml~=6.0.1
 
 # web server
diff --git a/vstutils/__init__.py b/vstutils/__init__.py
index 132d1ab5..dd9f247d 100644
--- a/vstutils/__init__.py
+++ b/vstutils/__init__.py
@@ -1,2 +1,2 @@
 # pylint: disable=django-not-available
-__version__: str = '5.8.12'
+__version__: str = '5.8.13'
diff --git a/vstutils/api/apps.py b/vstutils/api/apps.py
index 6ef57bb6..d8886849 100644
--- a/vstutils/api/apps.py
+++ b/vstutils/api/apps.py
@@ -1,7 +1,6 @@
 from django.conf import settings
 from django.apps import AppConfig
-
-from ..utils import import_class
+from django.utils.module_loading import import_string
 
 
 class VSTUtilsAppConfig(AppConfig):
@@ -11,7 +10,7 @@ class VSTUtilsAppConfig(AppConfig):
 
     def import_models(self):
         super().import_models()
-        self.module.notificator_class = import_class(
+        self.module.notificator_class = import_string(
             settings.NOTIFICATOR_CLIENT_CLASS
         )
 
diff --git a/vstutils/api/health.py b/vstutils/api/health.py
index b13fa67a..fe35d553 100644
--- a/vstutils/api/health.py
+++ b/vstutils/api/health.py
@@ -1,10 +1,11 @@
-from typing import Dict, Tuple, ClassVar, Callable
 from functools import wraps
+from typing import Dict, Tuple, ClassVar, Callable
 
 from django.db import connections, DatabaseError
+from django.utils.module_loading import import_string
 from rest_framework import status as st, request as req
 
-from ..utils import BaseVstObject, import_class
+from ..utils import BaseVstObject
 
 
 def health_wrapper(method):
@@ -81,7 +82,7 @@ def check_health_rpc(self):
         if not self.get_django_settings('RPC_ENABLED'):
             return 'disabled'
         try:
-            celery_app = import_class(
+            celery_app = import_string(
                 self.get_django_settings('WORKER_OPTIONS')['app'].replace(':', '.')
             )
         except ImportError:  # nocv
diff --git a/vstutils/api/models.py b/vstutils/api/models.py
index 16b1992f..9d1dc3a4 100644
--- a/vstutils/api/models.py
+++ b/vstutils/api/models.py
@@ -3,7 +3,7 @@
 import pyotp
 from django.conf import settings
 from django.db import models
-from django.utils.module_loading import import_string as import_class
+from django.utils.module_loading import import_string
 from django.utils.functional import cached_property
 
 from ..models import BaseModel, Manager, BQuerySet
@@ -37,7 +37,7 @@ def _get_translation_data(self, module_path_string, code, for_server=False):
         data = {}
         for dict_name in filter(bool, ['TRANSLATION'] + ['SERVER_TRANSLATION' if for_server else None]):
             try:
-                translation_data = import_class(module_path_string + '.translations.' + code + f'.{dict_name}')
+                translation_data = import_string(module_path_string + '.translations.' + code + f'.{dict_name}')
                 if not isinstance(translation_data, dict):
                     continue
                 data.update(translation_data.copy())
diff --git a/vstutils/api/routers.py b/vstutils/api/routers.py
index d9a75aac..70c15ea8 100644
--- a/vstutils/api/routers.py
+++ b/vstutils/api/routers.py
@@ -2,10 +2,10 @@
 from django.urls.conf import include, re_path, path
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
+from django.utils.module_loading import import_string
 from rest_framework import routers, permissions, versioning
 
 from . import responses
-from ..utils import import_class
 
 
 class _AbstractRouter(routers.DefaultRouter):
@@ -87,9 +87,9 @@ def unregister(self, prefix):
     def generate(self, views_list):
         for prefix, options in views_list.items():
             if 'view' in options:
-                view = import_class(options['view'])
+                view = import_string(options['view'])
             elif 'model' in options:
-                view = import_class(options['model']).generated_view
+                view = import_string(options['model']).generated_view
             args = [prefix, view]
             if 'name' in options:
                 args.append(options['name'])
@@ -114,7 +114,7 @@ def __init__(self, *args, **kwargs):
         self.__register_openapi()
 
     def __register_openapi(self):
-        schema_view = import_class(settings.OPENAPI_VIEW_CLASS)
+        schema_view = import_string(settings.OPENAPI_VIEW_CLASS)
         cache_timeout = settings.SCHEMA_CACHE_TIMEOUT
         swagger_kwargs = {'cache_timeout': 0 if settings.DEBUG or settings.TESTS_RUN else cache_timeout}
         self.register_view(
@@ -243,6 +243,6 @@ def generate_routers(self, api):
         # Register view for new bulk requests
         self.register_view(
             r'endpoint',
-            import_class(settings.ENDPOINT_VIEW_CLASS),
+            import_string(settings.ENDPOINT_VIEW_CLASS),
             'endpoint'
         )
diff --git a/vstutils/api/schema/generators.py b/vstutils/api/schema/generators.py
index ea4b9821..66f1171f 100644
--- a/vstutils/api/schema/generators.py
+++ b/vstutils/api/schema/generators.py
@@ -5,9 +5,10 @@
 import jwt
 from rest_framework import request as drf_request
 from django.conf import settings
+from django.utils.module_loading import import_string
 from drf_yasg import generators
 from drf_yasg.inspectors import field as field_insp
-from vstutils.utils import import_class, raise_context_decorator_with_default
+from vstutils.utils import raise_context_decorator_with_default
 
 
 def get_centrifugo_public_address(request: drf_request.Request):
@@ -42,7 +43,7 @@ def _get_hooks(self):
             filter(
                 bool,
                 map(
-                    raise_context_decorator_with_default()(import_class),
+                    raise_context_decorator_with_default()(import_string),
                     getattr(settings, 'OPENAPI_HOOKS', ())
                 )
             )
diff --git a/vstutils/api/views.py b/vstutils/api/views.py
index 81e07c97..3525ba3f 100644
--- a/vstutils/api/views.py
+++ b/vstutils/api/views.py
@@ -3,6 +3,7 @@
 
 from django.conf import settings
 from django.http import Http404, StreamingHttpResponse
+from django.utils.module_loading import import_string
 from rest_framework import (
     permissions as rest_permissions,
     throttling,
@@ -12,7 +13,6 @@
 
 from . import base, serializers, decorators as deco, responses, models
 from .decorators import subaction
-from ..utils import import_class
 
 
 class LanguageSerializer(serializers.VSTSerializer):
@@ -111,7 +111,7 @@ class HealthView(base.ListNonModelViewSet):
     permission_classes = (rest_permissions.AllowAny,)
     authentication_classes = ()
     throttle_classes = (HealthThrottle,)
-    health_backend = import_class(settings.HEALTH_BACKEND_CLASS)
+    health_backend = import_string(settings.HEALTH_BACKEND_CLASS)
 
     def list(self, request, *args, **kwargs):
         return responses.HTTP_200_OK(*self.health_backend(request).get())
@@ -121,7 +121,7 @@ class MetricsView(base.ListNonModelViewSet):
     permission_classes = (rest_permissions.AllowAny,)
     authentication_classes = ()
     throttle_classes = (MetricsThrottle,)
-    metrics_backend = import_class(settings.METRICS_BACKEND_CLASS)()
+    metrics_backend = import_string(settings.METRICS_BACKEND_CLASS)()
 
     def list(self, request, *args, **kwargs):
         return StreamingHttpResponse(
diff --git a/vstutils/gui/context.py b/vstutils/gui/context.py
index 4490823d..4a99dc7e 100644
--- a/vstutils/gui/context.py
+++ b/vstutils/gui/context.py
@@ -4,12 +4,13 @@
 from django.conf import settings
 from django.http.request import HttpRequest
 from django.utils.functional import lazy, SimpleLazyObject
+from django.utils.module_loading import import_string
 
-from ..utils import import_class, raise_context_decorator_with_default
+from ..utils import raise_context_decorator_with_default
 from ..static_files import SPA_STATIC_FILES_PROVIDERS
 
 
-manifest_object = import_class(settings.MANIFEST_CLASS)()
+manifest_object = import_string(settings.MANIFEST_CLASS)()
 project_lib_version = getattr(settings, 'PROJECT_LIB_VERSION', '')
 project_version = getattr(settings, 'PROJECT_VERSION', '')
 vstutils_version = settings.VSTUTILS_VERSION
diff --git a/vstutils/models/base.py b/vstutils/models/base.py
index e3c5eddb..60f8ec49 100644
--- a/vstutils/models/base.py
+++ b/vstutils/models/base.py
@@ -14,6 +14,7 @@
 from django.db.models.fields.related import ManyToManyField, OneToOneField, ForeignKey
 from django.utils.functional import SimpleLazyObject, lazy
 from django.db.models.signals import post_save, post_delete
+from django.utils.module_loading import import_string
 from django.dispatch import receiver
 from rest_framework.fields import ModelField, JSONField, CharField as drfCharField, ChoiceField
 from rest_framework.mixins import CreateModelMixin, UpdateModelMixin, DestroyModelMixin
@@ -30,7 +31,6 @@
     RelatedListField,
 )
 from ..utils import (
-    import_class,
     apply_decorators,
     classproperty,
     get_if_lazy,
@@ -164,7 +164,7 @@ def _ensure_pk_in_fields(model_class, fields):
 
 def _import_class_if_string(value):
     if isinstance(value, str):
-        return SimpleLazyObject(lambda: import_class(value))
+        return SimpleLazyObject(lambda: import_string(value))
     return value
 
 
@@ -561,7 +561,7 @@ def _get_view_class(cls, view_base_class):
         elif view_base_class == 'history':
             return api_base.HistoryModelViewSet  # nocv
         elif isinstance(view_base_class, str):
-            return import_class(view_base_class)
+            return import_string(view_base_class)
         return view_base_class
 
     def get_view_class(cls, **extra_options):  # noqa: CFQ001
diff --git a/vstutils/models/queryset.py b/vstutils/models/queryset.py
index cbb5c176..f8b4a5bc 100644
--- a/vstutils/models/queryset.py
+++ b/vstutils/models/queryset.py
@@ -141,27 +141,28 @@ def _get_deep_nested_qs_with_cte(self, with_current=False, deep_children=True):
             # then deep_parents
             sql_column_to_get, sql_deep_column = sql_deep_column, sql_column_to_get
 
-        with_current_sql = f'''
-            UNION
-            {self.values(origin_model_pk).order_by().query}
-        '''
-
-        sql = f'''
-            WITH RECURSIVE nested as (
-                    SELECT {sql_table}.{sql_column_to_get}, {sql_table}.{sql_deep_column}
-                    FROM {sql_table}
-                    WHERE {sql_table}.{sql_deep_column}
-                        IN ({str(self.values(origin_model_pk).order_by().query)})
-                UNION
-                    SELECT {sql_table}.{sql_column_to_get}, {sql_table}.{sql_deep_column}
-                    FROM {sql_table}
-                        JOIN nested
-                            ON {sql_table}.{sql_deep_column} = nested.{sql_column_to_get}
-            )
-            SELECT {sql_column_to_get} from nested
-        '''  # nosec
+        initial_qs = self.filter()
+        initial_qs.query.clear_ordering(True)
+        initial_qs.query.clear_select_fields()
+        initial_qs.query.clear_select_clause()
+        initial_qs = initial_qs.values(origin_model_pk)
+        sql = ' '.join((
+            'WITH RECURSIVE NRQ777 as (',
+                    f'SELECT NU777.{sql_column_to_get}, NU777.{sql_deep_column}',  # noqa: E131
+                    f'FROM {sql_table} NU777',
+                    f'WHERE NU777.{sql_deep_column}',
+                        f'IN ({str(initial_qs.query)})',  # noqa: E131
+                'UNION',  # noqa: E131
+                    f'SELECT NU777_1.{sql_column_to_get}, NU777_1.{sql_deep_column}',
+                    f'FROM {sql_table} NU777_1',
+                        'JOIN NRQ777',
+                            f'ON NU777_1.{sql_deep_column} = NRQ777.{sql_column_to_get}',  # noqa: E131
+            ')',
+            f'SELECT {sql_column_to_get} from NRQ777',  # nosec
+        ))
+
         if with_current:
-            sql += with_current_sql
+            sql += f' UNION {initial_qs.query}'
         return self.model.objects.filter(id__in=RawSQL(sql, []))  # nosec
 
     def _deep_nested_ids_without_cte(self, accumulated=None, deep_children=True):
diff --git a/vstutils/tasks.py b/vstutils/tasks.py
index d3315267..24c5880a 100644
--- a/vstutils/tasks.py
+++ b/vstutils/tasks.py
@@ -8,10 +8,11 @@
 from celery.result import AsyncResult
 from django.conf import settings
 from django.apps import apps
+from django.utils.module_loading import import_string
 
-from .utils import import_class, send_template_email_handler, Lock, translate as _
+from .utils import send_template_email_handler, Lock, translate as _
 
-celery_app: Celery = import_class(
+celery_app: Celery = import_string(
     settings.WORKER_OPTIONS['app'].replace(':', '.')
 )
 notificator = None
diff --git a/vstutils/tests.py b/vstutils/tests.py
index 0694dd46..b44a160f 100644
--- a/vstutils/tests.py
+++ b/vstutils/tests.py
@@ -20,7 +20,7 @@
 from django.utils.module_loading import import_string
 from fastapi.testclient import TestClient
 
-from .utils import import_class, raise_context_decorator_with_default
+from .utils import raise_context_decorator_with_default
 from .api.renderers import ORJSONRenderer
 
 User = get_user_model()
@@ -222,7 +222,7 @@ def get_model_class(self, model) -> django_models.Model:
 
         handlers = (
             lambda x: getattr(self.models, x, None) if self.models is not None else None,
-            import_class,
+            import_string,
             apps.get_model
         )
 
diff --git a/vstutils/utils.py b/vstutils/utils.py
index 1286a464..aebad9ef 100644
--- a/vstutils/utils.py
+++ b/vstutils/utils.py
@@ -31,7 +31,7 @@
 from django.template import loader
 from django.utils import translation, functional
 from django.utils.translation import get_language
-from django.utils.module_loading import import_string as import_class
+from django.utils.module_loading import import_string
 from django.views.decorators.csrf import csrf_exempt
 from django.views.generic.base import View
 
@@ -1213,7 +1213,7 @@ def list(self):
     def _get_backend(self, backend):
         if backend in self.__loaded_backends__:
             return self.__loaded_backends__[backend]
-        self.__loaded_backends__[backend] = import_class(backend)
+        self.__loaded_backends__[backend] = import_string(backend)
         return self.__loaded_backends__[backend]
 
     def get_backend_data(self, name):
diff --git a/yarn.lock b/yarn.lock
index 239310db..29f56381 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2838,9 +2838,9 @@ camelcase@^6.2.0:
   integrity sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==
 
 caniuse-lite@^1.0.30001538, caniuse-lite@^1.0.30001541:
-  version "1.0.30001551"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001551.tgz#1f2cfa8820bd97c971a57349d7fd8f6e08664a3e"
-  integrity sha512-vtBAez47BoGMMzlbYhfXrMV1kvRF2WP/lqiMuDu1Sb4EE4LKEgjopFDSRtZfdVnslNRpOqV/woE+Xgrwj6VQlg==
+  version "1.0.30001562"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001562.tgz"
+  integrity sha512-kfte3Hym//51EdX4239i+Rmp20EsLIYGdPkERegTgU19hQWCRhsRFGKHTliUlsry53tv17K7n077Kqa0WJU4ng==
 
 centrifuge@^2.8.0:
   version "2.8.5"