diff --git a/django-stubs/contrib/sessions/middleware.pyi b/django-stubs/contrib/sessions/middleware.pyi
index 44b3b38..ca3f565 100644
--- a/django-stubs/contrib/sessions/middleware.pyi
+++ b/django-stubs/contrib/sessions/middleware.pyi
@@ -1,14 +1,12 @@
-from typing import Callable, Optional, Type
+from typing import Type
 
 from django.contrib.sessions.backends.base import SessionBase
 from django.core.handlers.wsgi import WSGIRequest
 from django.http.request import HttpRequest
-from django.http.response import HttpResponseBase
+from django.http.response import HttpResponse
 from django.utils.deprecation import MiddlewareMixin
 
 class SessionMiddleware(MiddlewareMixin):
-    get_response: Callable[[WSGIRequest], HttpResponseBase] = ...
     SessionStore: Type[SessionBase] = ...
-    def __init__(self, get_response: Optional[Callable] = ...) -> None: ...
     def process_request(self, request: HttpRequest) -> None: ...
-    def process_response(self, request: WSGIRequest, response: HttpResponseBase) -> HttpResponseBase: ...
+    def process_response(self, request: WSGIRequest, response: HttpResponse) -> HttpResponse: ...
diff --git a/django-stubs/utils/deprecation.pyi b/django-stubs/utils/deprecation.pyi
index 3e8ed14..320382e 100644
--- a/django-stubs/utils/deprecation.pyi
+++ b/django-stubs/utils/deprecation.pyi
@@ -1,7 +1,7 @@
 from typing import Any, Callable, Optional, Type
 
-from django.http.request import HttpRequest
-from django.http.response import HttpResponseBase
+from django.core.handlers.wsgi import WSGIRequest
+from django.http.response import HttpResponse
 
 class RemovedInDjango30Warning(PendingDeprecationWarning): ...
 class RemovedInNextVersionWarning(DeprecationWarning): ...
@@ -22,10 +22,10 @@ class RenameMethodsBase(type):
 
 class DeprecationInstanceCheck(type):
     alternative: str
-    deprecation_warning: Type[django.utils.deprecation.RemovedInNextVersionWarning]
+    deprecation_warning: Type[Warning]
     def __instancecheck__(self, instance: Any): ...
 
 class MiddlewareMixin:
-    get_response: Any = ...
-    def __init__(self, get_response: Optional[Callable] = ...) -> None: ...
-    def __call__(self, request: HttpRequest) -> HttpResponseBase: ...
+    get_response: Callable[[WSGIRequest], HttpResponse] = ...
+    def __init__(self, get_response: Optional[Callable[[WSGIRequest], HttpResponse]] = ...) -> None: ...
+    def __call__(self, request: WSGIRequest) -> HttpResponse: ...