diff --git a/handler/adminhandler.py b/handler/adminhandler.py
index e8c7096..5494595 100644
--- a/handler/adminhandler.py
+++ b/handler/adminhandler.py
@@ -18,10 +18,10 @@ UT = TypeVar("UT")
 CCT = TypeVar("CCT", bound="CallbackContext[Any, Any, Any, Any]")
 
 
-class AdminHandler(BaseHandler[Update, CCT]):
+class AdminHandler(BaseHandler[Update, CCT, RT]):
     _lock = asyncio.Lock()
 
-    def __init__(self, handler: BaseHandler[Update, CCT], application: "Application") -> None:
+    def __init__(self, handler: BaseHandler[Update, CCT, RT], application: "Application") -> None:
         self.handler = handler
         self.application = application
         self.user_service: Optional["UserAdminService"] = None
diff --git a/handler/grouphandler.py b/handler/grouphandler.py
index 789b9c0..9a9fac7 100644
--- a/handler/grouphandler.py
+++ b/handler/grouphandler.py
@@ -17,11 +17,12 @@ if TYPE_CHECKING:
     from telegram import Bot
     from gram_core.application import Application
 
+RT = TypeVar("RT")
 UT = TypeVar("UT")
 CCT = TypeVar("CCT", bound="CallbackContext[Any, Any, Any, Any]")
 
 
-class GroupHandler(BaseHandler[UT, CCT]):
+class GroupHandler(BaseHandler[UT, CCT, RT]):
     _lock = asyncio.Lock()
     __lock = asyncio.Lock()
 
@@ -101,7 +102,7 @@ class GroupHandler(BaseHandler[UT, CCT]):
             await group_service.remove_update(chat.id)
             raise e
 
-    async def message_check_callback(self, update: Update, _: ContextTypes.DEFAULT_TYPE):
+    async def message_check_callback(self, update: Update, _: ContextTypes.DEFAULT_TYPE) -> RT:
         if update.inline_query is not None:
             return
         if update.effective_chat:
diff --git a/handler/hookhandler.py b/handler/hookhandler.py
index 9a9e1b5..5a01c7e 100644
--- a/handler/hookhandler.py
+++ b/handler/hookhandler.py
@@ -21,11 +21,11 @@ T_PreprocessorsFunc = Callable[
 ]
 
 
-class HookHandler(BaseHandler[Update, CCT]):
+class HookHandler(BaseHandler[Update, CCT, RT]):
 
     def __init__(
         self,
-        handler: BaseHandler[Update, CCT],
+        handler: BaseHandler[Update, CCT, RT],
         handler_data: Union["HandlerData", "ConversationData"],
         application: "Application",
     ) -> None: