diff --git a/aiogram/dispatcher/webhook.py b/aiogram/dispatcher/webhook.py
index 1711bffe..ca717202 100644
--- a/aiogram/dispatcher/webhook.py
+++ b/aiogram/dispatcher/webhook.py
@@ -87,8 +87,11 @@ class WebhookRequestHandler(web.View):
         :return: :class:`aiogram.Dispatcher`
         """
         dp = self.request.app[BOT_DISPATCHER_KEY]
-        context.set_value('dispatcher', dp)
-        context.set_value('bot', dp.bot)
+        try:
+            context.set_value('dispatcher', dp)
+            context.set_value('bot', dp.bot)
+        except RuntimeError:
+            pass
         return dp
 
     async def parse_update(self, bot):
diff --git a/aiogram/utils/context.py b/aiogram/utils/context.py
index ea922b48..376d9aa9 100644
--- a/aiogram/utils/context.py
+++ b/aiogram/utils/context.py
@@ -46,6 +46,8 @@ def get_current_state() -> typing.Dict:
     :rtype: :obj:`dict`
     """
     task = asyncio.Task.current_task()
+    if task is None:
+        raise RuntimeError('Can be used only in Task context.')
     context_ = getattr(task, 'context', None)
     if context_ is None:
         context_ = task.context = {}