diff --git a/discord/__main__.py b/discord/__main__.py
index 6e93c09b..f18c0090 100644
--- a/discord/__main__.py
+++ b/discord/__main__.py
@@ -23,23 +23,25 @@ DEALINGS IN THE SOFTWARE.
 """
 
 import argparse
+import platform
 import sys
 from pathlib import Path
+from typing import Dict, List
+
+import aiohttp
+import pkg_resources
 
 import discord
-import pkg_resources
-import aiohttp
-import platform
 
 
-def show_version():
-    entries = []
+def show_version() -> None:
+    entries: List[str] = []
 
     entries.append("- Python v{0.major}.{0.minor}.{0.micro}-{0.releaselevel}".format(sys.version_info))
-    version_info = discord.version_info
+    version_info: discord.version_info = discord.version_info
     entries.append("- discord.py v{0.major}.{0.minor}.{0.micro}-{0.releaselevel}".format(version_info))
     if version_info.releaselevel != "final":
-        pkg = pkg_resources.get_distribution("discord.py")
+        pkg: pkg_resources.Distribution = pkg_resources.get_distribution("discord.py")
         if pkg:
             entries.append(f"    - discord.py pkg_resources: v{pkg.version}")
 
@@ -49,12 +51,12 @@ def show_version():
     print("\n".join(entries))
 
 
-def core(parser, args):
+def core(parser, args) -> None:
     if args.version:
         show_version()
 
 
-_bot_template = """#!/usr/bin/env python3
+_bot_template: str = """#!/usr/bin/env python3
 
 from discord.ext import commands
 import discord
@@ -80,7 +82,7 @@ bot = Bot()
 bot.run(config.token)
 """
 
-_gitignore_template = """# Byte-compiled / optimized / DLL files
+_gitignore_template: str = """# Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
 *$py.class
@@ -110,7 +112,7 @@ var/
 config.py
 """
 
-_cog_template = '''from discord.ext import commands
+_cog_template: str = '''from discord.ext import commands
 import discord
 
 class {name}(commands.Cog{attrs}):
@@ -123,7 +125,7 @@ def setup(bot):
     bot.add_cog({name}(bot))
 '''
 
-_cog_extras = """
+_cog_extras: str = """
     def cog_unload(self):
         # clean up logic goes here
         pass
@@ -158,7 +160,7 @@ _cog_extras = """
 # certain file names and directory names are forbidden
 # see: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx
 # although some of this doesn't apply to Linux, we might as well be consistent
-_base_table = {
+_base_table: Dict[str, str] = {
     "<": "-",
     ">": "-",
     ":": "-",
@@ -176,7 +178,7 @@ _base_table.update((chr(i), None) for i in range(32))
 _translation_table = str.maketrans(_base_table)
 
 
-def to_path(parser, name, *, replace_spaces=False):
+def to_path(parser: argparse.ArgumentParser, name: str, *, replace_spaces: bool = False) -> Path:
     if isinstance(name, Path):
         return name
 
@@ -208,13 +210,13 @@ def to_path(parser, name, *, replace_spaces=False):
         if len(name) <= 4 and name.upper() in forbidden:
             parser.error("invalid directory name given, use a different one")
 
-    name = name.translate(_translation_table)
+    name: str = name.translate(_translation_table)
     if replace_spaces:
         name = name.replace(" ", "-")
     return Path(name)
 
 
-def newbot(parser, args):
+def newbot(parser: argparse.ArgumentParser, args) -> None:
     new_directory = to_path(parser, args.directory) / to_path(parser, args.name)
 
     # as a note exist_ok for Path is a 3.5+ only feature
@@ -241,7 +243,7 @@ def newbot(parser, args):
 
     try:
         with open(str(new_directory / "bot.py"), "w", encoding="utf-8") as fp:
-            base = "Bot" if not args.sharded else "AutoShardedBot"
+            base: str = "Bot" if not args.sharded else "AutoShardedBot"
             fp.write(_bot_template.format(base=base, prefix=args.prefix))
     except OSError as exc:
         parser.error(f"could not create bot file ({exc})")
@@ -256,7 +258,7 @@ def newbot(parser, args):
     print("successfully made bot at", new_directory)
 
 
-def newcog(parser, args):
+def newcog(parser, args) -> None:
     cog_dir = to_path(parser, args.directory)
     try:
         cog_dir.mkdir(exist_ok=True)
@@ -290,7 +292,7 @@ def newcog(parser, args):
         print("successfully made cog at", directory)
 
 
-def add_newbot_args(subparser):
+def add_newbot_args(subparser) -> None:
     parser = subparser.add_parser("newbot", help="creates a command bot project quickly")
     parser.set_defaults(func=newbot)
 
@@ -301,7 +303,7 @@ def add_newbot_args(subparser):
     parser.add_argument("--no-git", help="do not create a .gitignore file", action="store_true", dest="no_git")
 
 
-def add_newcog_args(subparser):
+def add_newcog_args(subparser) -> None:
     parser = subparser.add_parser("newcog", help="creates a new cog template quickly")
     parser.set_defaults(func=newcog)
 
@@ -315,8 +317,10 @@ def add_newcog_args(subparser):
     parser.add_argument("--full", help="add all special methods as well", action="store_true")
 
 
-def parse_args():
-    parser = argparse.ArgumentParser(prog="discord", description="Tools for helping with discord.py")
+def parse_args() -> None:
+    parser: argparse.ArgumentParser = argparse.ArgumentParser(
+        prog="discord", description="Tools for helping with discord.py"
+    )
     parser.add_argument("-v", "--version", action="store_true", help="shows the library version")
     parser.set_defaults(func=core)
 
@@ -326,7 +330,7 @@ def parse_args():
     return parser, parser.parse_args()
 
 
-def main():
+def main() -> None:
     parser, args = parse_args()
     args.func(parser, args)
 
diff --git a/discord/abc.py b/discord/abc.py
index 196043e3..cf7a40cd 100644
--- a/discord/abc.py
+++ b/discord/abc.py
@@ -703,7 +703,14 @@ class GuildChannel:
     ) -> None:
         ...
 
-    async def set_permissions(self, target, *, overwrite=_undefined, reason=None, **permissions):
+    async def set_permissions(
+        self,
+        target: Union[Member, User],
+        *,
+        overwrite: PermissionOverwrite = _undefined,
+        reason: Optional[str] = None,
+        **permissions: bool,
+    ):
         r"""|coro|
 
         Sets the channel specific permission overwrites for a target in the
diff --git a/discord/activity.py b/discord/activity.py
index 7294dbd9..0d21a027 100644
--- a/discord/activity.py
+++ b/discord/activity.py
@@ -121,7 +121,7 @@ class BaseActivity:
 
     __slots__ = ("_created_at",)
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs: Any) -> None:
         self._created_at: Optional[float] = kwargs.pop("created_at", None)
 
     @property
@@ -499,7 +499,7 @@ class Streaming(BaseActivity):
         return f"<Streaming name={self.name!r}>"
 
     @property
-    def twitch_name(self):
+    def twitch_name(self) -> Optional[str]:
         """Optional[:class:`str`]: If provided, the twitch name of the user streaming.
 
         This corresponds to the ``large_image`` key of the :attr:`Streaming.assets`
diff --git a/discord/client.py b/discord/client.py
index 3d0216d8..696affa2 100644
--- a/discord/client.py
+++ b/discord/client.py
@@ -87,7 +87,7 @@ __all__ = ("Client",)
 Coro = TypeVar("Coro", bound=Callable[..., Coroutine[Any, Any, Any]])
 
 
-_log = logging.getLogger(__name__)
+_log: logging.Logger = logging.getLogger(__name__)
 
 
 def _cancel_tasks(loop: asyncio.AbstractEventLoop) -> None:
diff --git a/discord/http.py b/discord/http.py
index 3fef633c..25e8a421 100644
--- a/discord/http.py
+++ b/discord/http.py
@@ -61,7 +61,7 @@ from .gateway import DiscordClientWebSocketResponse
 from . import __version__, utils
 from .utils import MISSING
 
-_log = logging.getLogger(__name__)
+_log: logging.Logger = logging.getLogger(__name__)
 
 if TYPE_CHECKING:
     from .file import File
diff --git a/discord/utils.py b/discord/utils.py
index 7908b5ec..309be56e 100644
--- a/discord/utils.py
+++ b/discord/utils.py
@@ -170,7 +170,7 @@ class CachedSlotProperty(Generic[T, T_co]):
 
 class classproperty(Generic[T_co]):
     def __init__(self, fget: Callable[[Any], T_co]) -> None:
-        self.fget = fget
+        self.fget: Callable[[Any], T_co] = fget
 
     def __get__(self, instance: Optional[Any], owner: Type[Any]) -> T_co:
         return self.fget(owner)
@@ -207,7 +207,7 @@ class SequenceProxy(Generic[T_co], collections.abc.Sequence):
     def __reversed__(self) -> Iterator[T_co]:
         return reversed(self.__proxied)
 
-    def index(self, value: Any, *args, **kwargs) -> int:
+    def index(self, value: Any, *args: Any, **kwargs: Any) -> int:
         return self.__proxied.index(value, *args, **kwargs)
 
     def count(self, value: Any) -> int:
@@ -507,15 +507,15 @@ def _parse_ratelimit_header(request: Any, *, use_clock: bool = False) -> float:
         return float(reset_after)
 
 
-async def maybe_coroutine(f, *args, **kwargs):
-    value = f(*args, **kwargs)
+async def maybe_coroutine(f: Callable[..., Any], *args: Any, **kwargs: Any) -> Callable[..., Any]:
+    value: Any = f(*args, **kwargs)
     if _isawaitable(value):
         return await value
     else:
         return value
 
 
-async def async_all(gen, *, check=_isawaitable):
+async def async_all(gen, *, check=_isawaitable) -> bool:
     for elem in gen:
         if check(elem):
             elem = await elem