diff --git a/crenata/application/tree.py b/crenata/application/tree.py
index 7a7e0ca..12c6d36 100644
--- a/crenata/application/tree.py
+++ b/crenata/application/tree.py
@@ -1,23 +1,25 @@
 from __future__ import annotations
 
 from discord import Interaction
-from discord._types import ClientT
 from discord.app_commands.errors import AppCommandError
 from discord.app_commands.tree import CommandTree
 
+from crenata.application.client import Crenata
 from crenata.application.error.handler import ErrorHandler
 
 
-class CrenataCommandTree(CommandTree[ClientT]):
-    def __init__(self, client: ClientT, *, fallback_to_global: bool = True):
+class CrenataCommandTree(CommandTree[Crenata]):
+    def __init__(self, client: Crenata, *, fallback_to_global: bool = True):
         super().__init__(client, fallback_to_global=fallback_to_global)
+        self.error_handler: ErrorHandler[Crenata] = ErrorHandler()
 
-        self.error_handler: ErrorHandler[ClientT] = ErrorHandler()
-
-    def set_error_handler(self, handler: ErrorHandler[ClientT]) -> None:
+    def set_error_handler(self, handler: ErrorHandler[Crenata]) -> None:
         self.error_handler = handler
 
     async def on_error(
-        self, interaction: Interaction[ClientT], error: AppCommandError
+        self, interaction: Interaction[Crenata], error: AppCommandError
     ) -> None:
         await self.error_handler.on_error(interaction, error)
+
+    async def interaction_check(self, interaction: Interaction[Crenata]) -> bool:
+        ...
diff --git a/crenata/application/view/__init__.py b/crenata/application/view/__init__.py
index 3b23147..3447c64 100644
--- a/crenata/application/view/__init__.py
+++ b/crenata/application/view/__init__.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Any, Optional
+from typing import Optional
 
 from discord import Interaction
 from discord.interactions import Interaction
@@ -20,9 +20,9 @@ def __init__(
         super().__init__(timeout=timeout)
 
         self.executor_id = executor_id
-        self.error_handler: ErrorHandler[Any] = ErrorHandler()
+        self.error_handler = ErrorHandler()
 
-    def set_error_handler(self, handler: ErrorHandler[Any]) -> None:
+    def set_error_handler(self, handler: ErrorHandler) -> None:
         self.error_handler = handler
 
     async def interaction_check(self, interaction: Interaction) -> bool: