diff --git a/nonebot/command/__init__.py b/nonebot/command/__init__.py
index 6b463cd8..c68e668e 100644
--- a/nonebot/command/__init__.py
+++ b/nonebot/command/__init__.py
@@ -7,13 +7,14 @@ from typing import (
 )
 
 from nonebot import NoneBot, permission as perm
-from nonebot.command.argfilter import ArgFilter_T, ValidateError
+from nonebot.command.argfilter import ValidateError
 from nonebot.helpers import context_id, send, render_expression
 from nonebot.log import logger
 from nonebot.message import Message
 from nonebot.session import BaseSession
 from nonebot.typing import (
-    Context_T, CommandName_T, CommandArgs_T, Message_T, State_T
+    Context_T, CommandName_T, CommandArgs_T, Message_T, State_T,
+    Filter_T
 )
 
 # key: one segment of command name
@@ -231,7 +232,7 @@ class CommandSession(BaseSession):
         self.current_key: Optional[str] = None
 
         # initialize current argument filters
-        self.current_arg_filters: Optional[List[ArgFilter_T]] = None
+        self.current_arg_filters: Optional[List[Filter_T]] = None
 
         self._current_send_kwargs: Dict[str, Any] = {}
 
@@ -332,7 +333,7 @@ class CommandSession(BaseSession):
 
     def get(self, key: str, *,
             prompt: Optional[Message_T] = None,
-            arg_filters: Optional[List[ArgFilter_T]] = None,
+            arg_filters: Optional[List[Filter_T]] = None,
             **kwargs) -> Any:
         """
         Get an argument with a given key.
diff --git a/nonebot/command/argfilter/__init__.py b/nonebot/command/argfilter/__init__.py
index ba78e3e1..ee751bce 100644
--- a/nonebot/command/argfilter/__init__.py
+++ b/nonebot/command/argfilter/__init__.py
@@ -1,12 +1,11 @@
-from typing import Callable, Any, Awaitable, Union, List, TYPE_CHECKING
+from typing import Awaitable, List, TYPE_CHECKING
 
 from nonebot.helpers import render_expression
+from nonebot.typing import Filter_T
 
 if TYPE_CHECKING:
     from nonebot.command import CommandSession
 
-ArgFilter_T = Callable[[Any], Union[Any, Awaitable[Any]]]
-
 
 class ValidateError(ValueError):
     def __init__(self, message=None):
@@ -14,7 +13,7 @@ class ValidateError(ValueError):
 
 
 async def run_arg_filters(session: 'CommandSession',
-                          arg_filters: List[ArgFilter_T]) -> None:
+                          arg_filters: List[Filter_T]) -> None:
     """
     Run a specific list of argument filters on a command session.
 
diff --git a/nonebot/command/argfilter/validators.py b/nonebot/command/argfilter/validators.py
index 5b6dad4b..edbcd36c 100644
--- a/nonebot/command/argfilter/validators.py
+++ b/nonebot/command/argfilter/validators.py
@@ -1,7 +1,7 @@
 import re
 from typing import Callable, Any
 
-from nonebot.command.argfilter import ValidateError, ArgFilter_T
+from nonebot.command.argfilter import ValidateError, Filter_T
 
 
 class BaseValidator:
@@ -16,7 +16,7 @@ def _raise_failure(message):
     raise ValidateError(message)
 
 
-def not_empty(message=None) -> ArgFilter_T:
+def not_empty(message=None) -> Filter_T:
     """
     Validate any object to ensure it's not empty (is None or has no elements).
     """
@@ -32,7 +32,7 @@ def not_empty(message=None) -> ArgFilter_T:
 
 
 def fit_size(min_length: int = 0, max_length: int = None,
-             message=None) -> ArgFilter_T:
+             message=None) -> Filter_T:
     """
     Validate any sized object to ensure the size/length
     is in a given range [min_length, max_length].
@@ -49,7 +49,7 @@ def fit_size(min_length: int = 0, max_length: int = None,
 
 
 def match_regex(pattern: str, message=None, *, flags=0,
-                fullmatch: bool = False) -> ArgFilter_T:
+                fullmatch: bool = False) -> Filter_T:
     """
     Validate any string object to ensure it matches a given pattern.
     """
@@ -69,7 +69,7 @@ def match_regex(pattern: str, message=None, *, flags=0,
 
 
 def ensure_true(bool_func: Callable[[Any], bool],
-                message=None) -> ArgFilter_T:
+                message=None) -> Filter_T:
     """
     Validate any object to ensure the result of applying
     a boolean function to it is True.
@@ -83,7 +83,7 @@ def ensure_true(bool_func: Callable[[Any], bool],
     return validate
 
 
-def between_inclusive(start=None, end=None, message=None) -> ArgFilter_T:
+def between_inclusive(start=None, end=None, message=None) -> Filter_T:
     """
     Validate any comparable object to ensure it's between
     `start` and `end` inclusively.
diff --git a/nonebot/typing.py b/nonebot/typing.py
index df890f14..121ef6d5 100644
--- a/nonebot/typing.py
+++ b/nonebot/typing.py
@@ -1,4 +1,4 @@
-from typing import Union, List, Dict, Any, Sequence, Callable, Tuple
+from typing import Union, List, Dict, Any, Sequence, Callable, Tuple, Awaitable
 
 Context_T = Dict[str, Any]
 Message_T = Union[str, Dict[str, Any], List[Dict[str, Any]]]
@@ -6,3 +6,4 @@ Expression_T = Union[str, Sequence[str], Callable]
 CommandName_T = Tuple[str, ...]
 CommandArgs_T = Dict[str, Any]
 State_T = Dict[str, Any]
+Filter_T = Callable[[Any], Union[Any, Awaitable[Any]]]