diff --git a/.circleci/config.yml b/.circleci/config.yml
index 4169dd8d..beef2d54 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,11 +1,11 @@
 version: 2.1
 orbs:
-  docker: circleci/docker@1.7.0
+  docker: circleci/docker@2.4.0
 
 jobs:
   build:
     docker:
-      - image: cimg/python:3.10
+      - image: cimg/python:3.11
 
     steps:
       - checkout
@@ -34,7 +34,7 @@ jobs:
 
   coverage:
     docker:
-      - image: cimg/python:3.10
+      - image: cimg/python:3.11
     steps:
       - checkout
       - attach_workspace:
@@ -73,5 +73,6 @@ workflows:
           image: f213/django
           path: testproject/django
           docker-context: testproject/django
+          extra_build_args: '--build-arg PYTHON_VERSION=3.11'
           deploy: false
           attach-at: .
diff --git a/{{cookiecutter.project_slug}}/.python-version b/{{cookiecutter.project_slug}}/.python-version
index 36435ac6..375f5cab 100644
--- a/{{cookiecutter.project_slug}}/.python-version
+++ b/{{cookiecutter.project_slug}}/.python-version
@@ -1 +1 @@
-3.10.8
+3.11.6
diff --git a/{{cookiecutter.project_slug}}/Dockerfile b/{{cookiecutter.project_slug}}/Dockerfile
index 3152c119..6b277cb1 100644
--- a/{{cookiecutter.project_slug}}/Dockerfile
+++ b/{{cookiecutter.project_slug}}/Dockerfile
@@ -1,5 +1,5 @@
 ARG PYTHON_VERSION
-FROM python:${PYTHON_VERSION}-slim-bullseye
+FROM python:${PYTHON_VERSION}-slim-bookworm
 LABEL maintainer="fedor@borshev.com"
 
 LABEL com.datadoghq.ad.logs='[{"source": "uwsgi", "service": "django"}]'
@@ -9,9 +9,9 @@ ENV DEBIAN_FRONTEND noninteractive
 
 ENV STATIC_ROOT /static
 
-ENV _UWSGI_VERSION 2.0.20
+ENV _UWSGI_VERSION 2.0.23
 
-RUN echo deb http://deb.debian.org/debian bullseye contrib non-free > /etc/apt/sources.list.d/debian-contrib.list \
+RUN echo deb http://deb.debian.org/debian bookworm contrib non-free > /etc/apt/sources.list.d/debian-contrib.list \
   && apt update \
   && apt --no-install-recommends install -y gettext locales-all wget \
   imagemagick tzdata wait-for-it build-essential \
diff --git a/{{cookiecutter.project_slug}}/Makefile b/{{cookiecutter.project_slug}}/Makefile
index 2de07f68..0e04bbac 100644
--- a/{{cookiecutter.project_slug}}/Makefile
+++ b/{{cookiecutter.project_slug}}/Makefile
@@ -27,3 +27,5 @@ test:
 	cd src && ./manage.py compilemessages
 	cd src && pytest --dead-fixtures
 	cd src && pytest -x
+
+pr: fmt lint test
diff --git a/{{cookiecutter.project_slug}}/pyproject.toml b/{{cookiecutter.project_slug}}/pyproject.toml
index 45b3221a..8d7f7da3 100644
--- a/{{cookiecutter.project_slug}}/pyproject.toml
+++ b/{{cookiecutter.project_slug}}/pyproject.toml
@@ -2,7 +2,7 @@
 name = "{{cookiecutter.project_slug}}"
 version = "{{cookiecutter.project_version}}"
 dependencies = [
-    "Django<3.3",
+    "Django<4.3",
     "bcrypt",
     "django-behaviors",
     "django-environ",
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers.py-tpl
deleted file mode 100644
index 058c2956..00000000
--- a/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers.py-tpl
+++ /dev/null
@@ -1,3 +0,0 @@
-from rest_framework import serializers
-
-# Create your DRF serializers here.
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/__init__.py b/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/__init__.py
new file mode 100644
index 00000000..44f0b885
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/__init__.py
@@ -0,0 +1,3 @@
+__all__ = [
+    "",
+]
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/app_name.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/app_name.py-tpl
new file mode 100644
index 00000000..3cfd0eef
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/api/serializers/app_name.py-tpl
@@ -0,0 +1,3 @@
+from rest_framework import serializers
+
+# Rename this file to singular form of your entity, e.g. "orders.py -> order.py". Add your class to __init__.py.
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/urls.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/api/urls.py-tpl
similarity index 100%
rename from {{cookiecutter.project_slug}}/src/.django-app-template/urls.py-tpl
rename to {{cookiecutter.project_slug}}/src/.django-app-template/api/urls.py-tpl
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/__init__.py b/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/__init__.py
new file mode 100644
index 00000000..44f0b885
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/__init__.py
@@ -0,0 +1,3 @@
+__all__ = [
+    "",
+]
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/app_name.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/app_name.py-tpl
new file mode 100644
index 00000000..999e02e2
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/api/views/app_name.py-tpl
@@ -0,0 +1,3 @@
+from app.api.viewsets import DefaultModelViewSet
+
+# Rename this file to singular form of your entity, e.g. "orders.py -> order.py". Add your class to __init__.py.
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/api/viewsets.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/api/viewsets.py-tpl
deleted file mode 100644
index 18a66958..00000000
--- a/{{cookiecutter.project_slug}}/src/.django-app-template/api/viewsets.py-tpl
+++ /dev/null
@@ -1,4 +0,0 @@
-from {{ app_name }}.api import serializers
-from app.api.viewsets import DefaultModelViewSet
-
-# Create your API views and viewsets here.
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/models.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/models.py-tpl
deleted file mode 100644
index 1ed72cc7..00000000
--- a/{{cookiecutter.project_slug}}/src/.django-app-template/models.py-tpl
+++ /dev/null
@@ -1,5 +0,0 @@
-from django.db import models
-
-from app.models import DefaultModel
-
-# Create your models here.
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/models/__init__.py b/{{cookiecutter.project_slug}}/src/.django-app-template/models/__init__.py
new file mode 100644
index 00000000..44f0b885
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/models/__init__.py
@@ -0,0 +1,3 @@
+__all__ = [
+    "",
+]
diff --git a/{{cookiecutter.project_slug}}/src/.django-app-template/models/app_name.py-tpl b/{{cookiecutter.project_slug}}/src/.django-app-template/models/app_name.py-tpl
new file mode 100644
index 00000000..0ca24cdc
--- /dev/null
+++ b/{{cookiecutter.project_slug}}/src/.django-app-template/models/app_name.py-tpl
@@ -0,0 +1,5 @@
+from django.db import models
+
+from app.models import DefaultModel, TimestampedModel
+
+# Rename this file to singular form of your entity, e.g. "orders.py -> order.py". Add your class to __init__.py.
diff --git a/{{cookiecutter.project_slug}}/src/a12n/urls.py b/{{cookiecutter.project_slug}}/src/a12n/api/urls.py
similarity index 100%
rename from {{cookiecutter.project_slug}}/src/a12n/urls.py
rename to {{cookiecutter.project_slug}}/src/a12n/api/urls.py
diff --git a/{{cookiecutter.project_slug}}/src/app/api/viewsets.py b/{{cookiecutter.project_slug}}/src/app/api/viewsets.py
index e69de29b..0303f45e 100644
--- a/{{cookiecutter.project_slug}}/src/app/api/viewsets.py
+++ b/{{cookiecutter.project_slug}}/src/app/api/viewsets.py
@@ -0,0 +1,177 @@
+from typing import Any, Optional, Protocol, Type
+
+from rest_framework import mixins
+from rest_framework import status
+from rest_framework.mixins import CreateModelMixin
+from rest_framework.mixins import UpdateModelMixin
+from rest_framework.request import Request
+from rest_framework.response import Response
+from rest_framework.serializers import BaseSerializer
+from rest_framework.viewsets import GenericViewSet
+
+__all__ = ["DefaultModelViewSet"]
+
+
+class BaseGenericViewSet(Protocol):
+    def get_serializer(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def get_response(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def perform_create(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def perform_update(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def get_success_headers(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def get_serializer_class(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+    def get_object(self, *args: Any, **kwargs: Any) -> Any:
+        ...
+
+
+class DefaultCreateModelMixin(CreateModelMixin):
+    """Return detail-serialized created instance"""
+
+    def create(self: BaseGenericViewSet, request: Request, *args: Any, **kwargs: Any) -> Response:
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        instance = self.perform_create(serializer)  # No getting created instance in original DRF
+        headers = self.get_success_headers(serializer.data)
+        return self.get_response(instance, status.HTTP_201_CREATED, headers)
+
+    def perform_create(self: BaseGenericViewSet, serializer: Any) -> Any:
+        return serializer.save()  # No returning created instance in original DRF
+
+
+class DefaultUpdateModelMixin(UpdateModelMixin):
+    """Return detail-serialized updated instance"""
+
+    def update(self: BaseGenericViewSet, request: Request, *args: Any, **kwargs: Any) -> Response:
+        partial = kwargs.pop("partial", False)
+        instance = self.get_object()
+        serializer = self.get_serializer(instance, data=request.data, partial=partial)
+        serializer.is_valid(raise_exception=True)
+        instance = self.perform_update(serializer)  # No getting updated instance in original DRF
+
+        if getattr(instance, "_prefetched_objects_cache", None):
+            # If 'prefetch_related' has been applied to a queryset, we need to
+            # forcibly invalidate the prefetch cache on the instance.
+            instance._prefetched_objects_cache = {}
+
+        return self.get_response(instance, status.HTTP_200_OK)
+
+    def perform_update(self: BaseGenericViewSet, serializer: Any) -> Any:
+        return serializer.save()  # No returning updated instance in original DRF
+
+
+class ResponseWithRetrieveSerializerMixin:
+    """
+    Always response with 'retrieve' serializer or fallback to `serializer_class`.
+    Usage:
+
+    class MyViewSet(DefaultModelViewSet):
+        serializer_class = MyDefaultSerializer
+        serializer_action_classes = {
+           'list': MyListSerializer,
+           'my_action': MyActionSerializer,
+        }
+        @action
+        def my_action:
+            ...
+
+    'my_action' request will be validated with MyActionSerializer,
+    but response will be serialized with MyDefaultSerializer
+    (or 'retrieve' if provided).
+
+    Thanks gonz: http://stackoverflow.com/a/22922156/11440
+
+    """
+
+    def get_response(
+        self: BaseGenericViewSet,
+        instance: Any,
+        status: Any,
+        headers: Any = None,
+    ) -> Response:
+        retrieve_serializer_class = self.get_serializer_class(action="retrieve")
+        context = self.get_serializer_context()  # type: ignore
+        retrieve_serializer = retrieve_serializer_class(instance, context=context)
+        return Response(
+            retrieve_serializer.data,
+            status=status,
+            headers=headers,
+        )
+
+    def get_serializer_class(
+        self: BaseGenericViewSet,
+        action: Optional[str] = None,
+    ) -> Type[BaseSerializer]:
+        if action is None:
+            action = self.action  # type: ignore
+
+        try:
+            return self.serializer_action_classes[action]  # type: ignore
+        except (KeyError, AttributeError):
+            return super().get_serializer_class()  # type: ignore
+
+
+class DefaultModelViewSet(
+    DefaultCreateModelMixin,  # Create response is overriden
+    mixins.RetrieveModelMixin,
+    DefaultUpdateModelMixin,  # Update response is overriden
+    mixins.DestroyModelMixin,
+    mixins.ListModelMixin,
+    ResponseWithRetrieveSerializerMixin,  # Response with retrieve or default serializer
+    GenericViewSet,
+):
+    pass
+
+
+class ReadonlyModelViewSet(
+    mixins.RetrieveModelMixin,
+    mixins.ListModelMixin,
+    ResponseWithRetrieveSerializerMixin,  # Response with retrieve or default serializer
+    GenericViewSet,
+):
+    pass
+
+
+class ListOnlyModelViewSet(
+    mixins.ListModelMixin,
+    ResponseWithRetrieveSerializerMixin,  # Response with retrieve or default serializer
+    GenericViewSet,
+):
+    pass
+
+
+class UpdateOnlyModelViewSet(
+    DefaultUpdateModelMixin,
+    ResponseWithRetrieveSerializerMixin,
+    GenericViewSet,
+):
+    pass
+
+
+class DefaultRetrieveDestroyListViewSet(
+    mixins.RetrieveModelMixin,
+    mixins.DestroyModelMixin,
+    mixins.ListModelMixin,
+    ResponseWithRetrieveSerializerMixin,  # Response with retrieve or default serializer
+    GenericViewSet,
+):
+    pass
+
+
+class ListUpdateModelViewSet(
+    DefaultUpdateModelMixin,
+    mixins.ListModelMixin,
+    ResponseWithRetrieveSerializerMixin,
+    GenericViewSet,
+):
+    pass
diff --git a/{{cookiecutter.project_slug}}/src/app/urls/v1.py b/{{cookiecutter.project_slug}}/src/app/urls/v1.py
index dad4b295..c49cc038 100644
--- a/{{cookiecutter.project_slug}}/src/app/urls/v1.py
+++ b/{{cookiecutter.project_slug}}/src/app/urls/v1.py
@@ -6,8 +6,8 @@
 
 app_name = "api_v1"
 urlpatterns = [
-    path("auth/", include("a12n.urls")),
-    path("users/", include("users.urls")),
+    path("auth/", include("a12n.api.urls")),
+    path("users/", include("users.api.urls")),
     path("healthchecks/", include("django_healthchecks.urls")),
     path("docs/schema/", SpectacularAPIView.as_view(), name="schema"),
     path("docs/swagger/", SpectacularSwaggerView.as_view(url_name="schema")),
diff --git a/{{cookiecutter.project_slug}}/src/users/urls.py b/{{cookiecutter.project_slug}}/src/users/api/urls.py
similarity index 100%
rename from {{cookiecutter.project_slug}}/src/users/urls.py
rename to {{cookiecutter.project_slug}}/src/users/api/urls.py