diff --git a/discord/appinfo.py b/discord/appinfo.py
index a7f8da82f..47ec10698 100644
--- a/discord/appinfo.py
+++ b/discord/appinfo.py
@@ -24,15 +24,19 @@ DEALINGS IN THE SOFTWARE.
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Optional
+from typing import List, TYPE_CHECKING, Optional
 
 from . import utils
 from .asset import Asset
 
 if TYPE_CHECKING:
     from .guild import Guild
-    from .types.appinfo import AppInfo as AppInfoPayload, PartialAppInfo as PartialAppInfoPayload
-
+    from .types.appinfo import (
+        AppInfo as AppInfoPayload,
+        PartialAppInfo as PartialAppInfoPayload,
+        Team as TeamPayload,
+    )
+    from .user import User
     from .state import ConnectionState
 
 __all__ = (
@@ -131,32 +135,32 @@ class AppInfo:
         'privacy_policy_url',
     )
 
-    def __init__(self, state, data: AppInfoPayload):
+    def __init__(self, state: ConnectionState, data: AppInfoPayload):
         from .team import Team
 
-        self._state = state
-        self.id = int(data['id'])
-        self.name = data['name']
-        self.description = data['description']
-        self._icon = data['icon']
-        self.rpc_origins = data['rpc_origins']
-        self.bot_public = data['bot_public']
-        self.bot_require_code_grant = data['bot_require_code_grant']
-        self.owner = state.store_user(data['owner'])
+        self._state: ConnectionState = state
+        self.id: int = int(data['id'])
+        self.name: str = data['name']
+        self.description: str = data['description']
+        self._icon: Optional[str] = data['icon']
+        self.rpc_origins: List[str] = data['rpc_origins']
+        self.bot_public: bool = data['bot_public']
+        self.bot_require_code_grant: bool = data['bot_require_code_grant']
+        self.owner: User = state.store_user(data['owner'])
 
-        team = data.get('team')
-        self.team = Team(state, team) if team else None
+        team: Optional[TeamPayload] = data.get('team')
+        self.team: Optional[Team] = Team(state, team) if team else None
 
-        self.summary = data['summary']
-        self.verify_key = data['verify_key']
+        self.summary: str = data['summary']
+        self.verify_key: str = data['verify_key']
 
-        self.guild_id = utils._get_as_snowflake(data, 'guild_id')
+        self.guild_id: Optional[int] = utils._get_as_snowflake(data, 'guild_id')
 
-        self.primary_sku_id = utils._get_as_snowflake(data, 'primary_sku_id')
-        self.slug = data.get('slug')
-        self._cover_image = data.get('cover_image')
-        self.terms_of_service_url = data.get('terms_of_service_url')
-        self.privacy_policy_url = data.get('privacy_policy_url')
+        self.primary_sku_id: Optional[int] = utils._get_as_snowflake(data, 'primary_sku_id')
+        self.slug: Optional[str] = data.get('slug')
+        self._cover_image: Optional[str] = data.get('cover_image')
+        self.terms_of_service_url: Optional[str] = data.get('terms_of_service_url')
+        self.privacy_policy_url: Optional[str] = data.get('privacy_policy_url')
 
     def __repr__(self) -> str:
         return (
@@ -221,16 +225,16 @@ class PartialAppInfo:
     __slots__ = ('_state', 'id', 'name', 'description', 'rpc_origins', 'summary', 'verify_key', 'terms_of_service_url', 'privacy_policy_url', '_icon')
 
     def __init__(self, *, state: ConnectionState, data: PartialAppInfoPayload):
-        self._state = state
-        self.id = int(data['id'])
-        self.name = data['name']
-        self._icon = data.get('icon')
-        self.description = data['description']
-        self.rpc_origins = data.get('rpc_origins')
-        self.summary = data['summary']
-        self.verify_key = data['verify_key']
-        self.terms_of_service_url = data.get('terms_of_service_url')
-        self.privacy_policy_url = data.get('privacy_policy_url')
+        self._state: ConnectionState = state
+        self.id: int = int(data['id'])
+        self.name: str = data['name']
+        self._icon: Optional[str] = data.get('icon')
+        self.description: str = data['description']
+        self.rpc_origins: Optional[List[str]] = data.get('rpc_origins')
+        self.summary: str = data['summary']
+        self.verify_key: str = data['verify_key']
+        self.terms_of_service_url: Optional[str] = data.get('terms_of_service_url')
+        self.privacy_policy_url: Optional[str] = data.get('privacy_policy_url')
 
     def __repr__(self) -> str:
         return f'<{self.__class__.__name__} id={self.id} name={self.name!r} description={self.description!r}>'
diff --git a/discord/team.py b/discord/team.py
index 94cf6e59d..b7b682044 100644
--- a/discord/team.py
+++ b/discord/team.py
@@ -29,9 +29,11 @@ from .user import BaseUser
 from .asset import Asset
 from .enums import TeamMembershipState, try_enum
 
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Optional, List
 
 if TYPE_CHECKING:
+    from .state import ConnectionState
+
     from .types.team import (
         Team as TeamPayload,
         TeamMember as TeamMemberPayload,
@@ -62,14 +64,14 @@ class Team:
 
     __slots__ = ('_state', 'id', 'name', '_icon', 'owner_id', 'members')
 
-    def __init__(self, state, data: TeamPayload):
-        self._state = state
+    def __init__(self, state: ConnectionState, data: TeamPayload):
+        self._state: ConnectionState = state
 
-        self.id = int(data['id'])
-        self.name = data['name']
-        self._icon = data['icon']
-        self.owner_id = utils._get_as_snowflake(data, 'owner_user_id')
-        self.members = [TeamMember(self, self._state, member) for member in data['members']]
+        self.id: int = int(data['id'])
+        self.name: str = data['name']
+        self._icon: Optional[str] = data['icon']
+        self.owner_id: Optional[int] = utils._get_as_snowflake(data, 'owner_user_id')
+        self.members: List[TeamMember] = [TeamMember(self, self._state, member) for member in data['members']]
 
     def __repr__(self) -> str:
         return f'<{self.__class__.__name__} id={self.id} name={self.name}>'
@@ -130,10 +132,10 @@ class TeamMember(BaseUser):
 
     __slots__ = BaseUser.__slots__ + ('team', 'membership_state', 'permissions')
 
-    def __init__(self, team: Team, state, data: TeamMemberPayload):
-        self.team = team
-        self.membership_state = try_enum(TeamMembershipState, data['membership_state'])
-        self.permissions = data['permissions']
+    def __init__(self, team: Team, state: ConnectionState, data: TeamMemberPayload):
+        self.team: Team = team
+        self.membership_state: TeamMembershipState = try_enum(TeamMembershipState, data['membership_state'])
+        self.permissions: List[str] = data['permissions']
         super().__init__(state=state, data=data['user'])
 
     def __repr__(self) -> str:
diff --git a/discord/types/team.py b/discord/types/team.py
index e8cd524f8..918ede605 100644
--- a/discord/types/team.py
+++ b/discord/types/team.py
@@ -24,7 +24,7 @@ DEALINGS IN THE SOFTWARE.
 
 from __future__ import annotations
 
-from typing import TypedDict, List
+from typing import TypedDict, List, Optional
 
 from .user import PartialUser
 from .snowflake import Snowflake
@@ -40,4 +40,4 @@ class Team(TypedDict):
     name: str
     owner_id: Snowflake
     members: List[TeamMember]
-    icon: str
+    icon: Optional[str]