diff --git a/nonebot/adapters/mirai/bot.py b/nonebot/adapters/mirai/bot.py
index fba54a69..6190bedb 100644
--- a/nonebot/adapters/mirai/bot.py
+++ b/nonebot/adapters/mirai/bot.py
@@ -58,6 +58,7 @@ class WebSocket(BaseWebSocket):
             try:
                 data = await self.receive()
             except websockets.ConnectionClosedOK:
+                logger.debug(f'Websocket connection {self.websocket} closed')
                 break
             except Exception as e:
                 logger.exception(f'Websocket client listened {self.websocket} '
diff --git a/nonebot/adapters/mirai/event/base.py b/nonebot/adapters/mirai/event/base.py
index 451a858e..7a6cae39 100644
--- a/nonebot/adapters/mirai/event/base.py
+++ b/nonebot/adapters/mirai/event/base.py
@@ -1,12 +1,14 @@
+import json
 from enum import Enum
-from typing import Dict, Any, Optional, Type
+from typing import Any, Dict, Optional, Type
+
 from pydantic import BaseModel, Field, ValidationError
 from typing_extensions import Literal
 
 from nonebot.adapters import Event as BaseEvent
 from nonebot.adapters import Message as BaseMessage
-from nonebot.typing import overrides
 from nonebot.log import logger
+from nonebot.typing import overrides
 
 
 class SenderPermission(str, Enum):
@@ -104,3 +106,6 @@ class Event(BaseEvent):
     @overrides(BaseEvent)
     def is_tome(self) -> bool:
         return False
+
+    def normalize_dict(self, **kwargs) -> Dict[str, Any]:
+        return json.loads(self.json(**kwargs))
diff --git a/nonebot/adapters/mirai/event/message.py b/nonebot/adapters/mirai/event/message.py
index f680b0a2..9c478e28 100644
--- a/nonebot/adapters/mirai/event/message.py
+++ b/nonebot/adapters/mirai/event/message.py
@@ -1,10 +1,11 @@
 from typing import TYPE_CHECKING
 
 from pydantic import Field
-from .base import Event, SenderInfo, PrivateSenderInfo
+
+from nonebot.typing import overrides
 
 from ..message import MessageChain
-from nonebot.typing import overrides
+from .base import Event, PrivateSenderInfo, SenderInfo
 
 
 class MessageEvent(Event):
@@ -37,4 +38,4 @@ class FriendMessage(MessageEvent):
 
 
 class TempMessage(MessageEvent):
-    pass
\ No newline at end of file
+    pass
diff --git a/nonebot/adapters/mirai/event/notice.py b/nonebot/adapters/mirai/event/notice.py
index ae144b91..b758d9c5 100644
--- a/nonebot/adapters/mirai/event/notice.py
+++ b/nonebot/adapters/mirai/event/notice.py
@@ -1,4 +1,4 @@
-from typing import Optional, Any
+from typing import Any, Optional
 
 from pydantic import Field
 
diff --git a/nonebot/adapters/mirai/message.py b/nonebot/adapters/mirai/message.py
index 06fc0d28..7562b6be 100644
--- a/nonebot/adapters/mirai/message.py
+++ b/nonebot/adapters/mirai/message.py
@@ -1,5 +1,5 @@
 from enum import Enum
-from typing import Any, Dict, List, Union, Iterable
+from typing import Any, Dict, Iterable, List, Union
 
 from pydantic import validate_arguments