diff --git a/stubs/Authlib/METADATA.toml b/stubs/Authlib/METADATA.toml
index 5c2a9e76e1ed..12a214e9477b 100644
--- a/stubs/Authlib/METADATA.toml
+++ b/stubs/Authlib/METADATA.toml
@@ -1,3 +1,3 @@
 version = "1.6.11"
 upstream-repository = "https://github.com/authlib/authlib"
-dependencies = ["cryptography"]
+dependencies = ["cryptography", "types-oauthlib", "requests"]
diff --git a/stubs/Authlib/authlib/integrations/httpx_client/oauth2_client.pyi b/stubs/Authlib/authlib/integrations/httpx_client/oauth2_client.pyi
index 9493842b5378..9b8cf04e95f7 100644
--- a/stubs/Authlib/authlib/integrations/httpx_client/oauth2_client.pyi
+++ b/stubs/Authlib/authlib/integrations/httpx_client/oauth2_client.pyi
@@ -1,6 +1,6 @@
 from _typeshed import Incomplete
 from collections.abc import Generator
-from typing import NoReturn, TypeAlias
+from typing import ClassVar, NoReturn, TypeAlias
 
 from authlib.oauth2.auth import ClientAuth, TokenAuth
 from authlib.oauth2.client import OAuth2Client as _OAuth2Client
@@ -24,10 +24,10 @@ class OAuth2ClientAuth(ClientAuth):
 
 # Inherits from httpx.AsyncClient
 class AsyncOAuth2Client(_OAuth2Client):
-    SESSION_REQUEST_PARAMS: list[str]
-    client_auth_class = OAuth2ClientAuth
-    token_auth_class = OAuth2Auth
-    oauth_error_class = OAuthError  # type: ignore[assignment]
+    SESSION_REQUEST_PARAMS: ClassVar[list[str]]
+    client_auth_class: ClassVar[type[OAuth2ClientAuth]]
+    token_auth_class: ClassVar[type[OAuth2Auth]]
+    oauth_error_class: ClassVar[type[OAuthError]]
     def __init__(
         self,
         client_id=None,
@@ -48,10 +48,10 @@ class AsyncOAuth2Client(_OAuth2Client):
 
 # Inherits from httpx.Client
 class OAuth2Client(_OAuth2Client):
-    SESSION_REQUEST_PARAMS: list[str]
-    client_auth_class = OAuth2ClientAuth
-    token_auth_class = OAuth2Auth
-    oauth_error_class = OAuthError  # type: ignore[assignment]
+    SESSION_REQUEST_PARAMS: ClassVar[list[str]]
+    client_auth_class: ClassVar[type[OAuth2ClientAuth]]
+    token_auth_class: ClassVar[type[OAuth2Auth]]
+    oauth_error_class: ClassVar[type[OAuthError]]
     def __init__(
         self,
         client_id=None,
diff --git a/stubs/Authlib/authlib/integrations/requests_client/oauth2_session.pyi b/stubs/Authlib/authlib/integrations/requests_client/oauth2_session.pyi
index f358acc47ca5..81a7559bd0d7 100644
--- a/stubs/Authlib/authlib/integrations/requests_client/oauth2_session.pyi
+++ b/stubs/Authlib/authlib/integrations/requests_client/oauth2_session.pyi
@@ -1,43 +1,46 @@
-from _typeshed import Incomplete
+from collections.abc import Callable
+from typing import Any, ClassVar, TypeVar
 
 from authlib.oauth2.auth import ClientAuth, TokenAuth
 from authlib.oauth2.client import OAuth2Client
+from oauthlib.oauth2 import OAuth2Token
+from requests import PreparedRequest, Response, Session
+from requests.auth import AuthBase
 
 from ..base_client import OAuthError
 
 __all__ = ["OAuth2Session", "OAuth2Auth"]
 
-# Inherits from requests.auth.AuthBase
-class OAuth2Auth(TokenAuth):
+_PR = TypeVar("_PR", bound=PreparedRequest)
+
+class OAuth2Auth(AuthBase, TokenAuth):
     def ensure_active_token(self) -> None: ...
-    def __call__(self, req): ...
+    def __call__(self, req: _PR) -> _PR: ...
 
-# Inherits from requests.auth.AuthBase
-class OAuth2ClientAuth(ClientAuth):
-    def __call__(self, req): ...
+class OAuth2ClientAuth(AuthBase, ClientAuth):
+    def __call__(self, req: _PR) -> _PR: ...
 
-# Inherits from requests.Session
-class OAuth2Session(OAuth2Client):
-    client_auth_class = OAuth2ClientAuth
-    token_auth_class = OAuth2Auth
-    oauth_error_class = OAuthError  # type: ignore[assignment]
-    SESSION_REQUEST_PARAMS: tuple[str, ...]  # type: ignore[assignment]
-    default_timeout: Incomplete
+class OAuth2Session(OAuth2Client, Session):
+    client_auth_class: ClassVar[type[OAuth2ClientAuth]]
+    token_auth_class: ClassVar[type[OAuth2Auth]]
+    oauth_error_class: ClassVar[type[OAuthError]]
+    SESSION_REQUEST_PARAMS: ClassVar[tuple[str, ...]]
+    default_timeout: float | tuple[float | None, float | None] | None
     def __init__(
         self,
-        client_id=None,
-        client_secret=None,
-        token_endpoint_auth_method=None,
-        revocation_endpoint_auth_method=None,
-        scope=None,
-        state=None,
-        redirect_uri=None,
-        token=None,
-        token_placement="header",
-        update_token=None,
-        leeway=60,
-        default_timeout=None,
+        client_id: str | None = None,
+        client_secret: str | None = None,
+        token_endpoint_auth_method: str | None = None,
+        revocation_endpoint_auth_method: str | None = None,
+        scope: str | None = None,
+        state: str | None = None,
+        redirect_uri: str | None = None,
+        token: dict[str, Any] | None = None,
+        token_placement: str = ...,
+        update_token: Callable[[OAuth2Token], None] | None = None,
+        leeway: int = ...,
+        default_timeout: float | tuple[float | None, float | None] | None = None,
         **kwargs,
     ) -> None: ...
-    def fetch_access_token(self, url=None, **kwargs): ...
-    def request(self, method, url, withhold_token=False, auth=None, **kwargs): ...
+    def fetch_access_token(self, url: str | None = None, **kwargs) -> OAuth2Token: ...
+    def request(self, method: str, url: str, withhold_token: bool = False, auth=None, **kwargs) -> Response: ...  # type: ignore[override]
diff --git a/stubs/Authlib/authlib/oauth2/client.pyi b/stubs/Authlib/authlib/oauth2/client.pyi
index c502a92b5e67..30b37039b6de 100644
--- a/stubs/Authlib/authlib/oauth2/client.pyi
+++ b/stubs/Authlib/authlib/oauth2/client.pyi
@@ -1,15 +1,18 @@
 from _typeshed import Incomplete
+from collections.abc import Sequence
+from typing import ClassVar
 
-from authlib.oauth2 import ClientAuth, OAuth2Error, TokenAuth
+from authlib.common.errors import AuthlibBaseError
+from authlib.oauth2 import ClientAuth, TokenAuth
 
 DEFAULT_HEADERS: Incomplete
 
 class OAuth2Client:
-    client_auth_class = ClientAuth
-    token_auth_class = TokenAuth
-    oauth_error_class = OAuth2Error
+    client_auth_class: ClassVar[type[ClientAuth]]
+    token_auth_class: ClassVar[type[TokenAuth]]
+    oauth_error_class: ClassVar[type[AuthlibBaseError]]
     EXTRA_AUTHORIZE_PARAMS: tuple[str, ...]
-    SESSION_REQUEST_PARAMS: list[str]
+    SESSION_REQUEST_PARAMS: ClassVar[Sequence[str]]
     session: Incomplete
     client_id: Incomplete
     client_secret: Incomplete