diff --git a/router.py b/router.py
index 3869fd6..449821d 100644
--- a/router.py
+++ b/router.py
@@ -1,6 +1,6 @@
 import asyncio
 import json
-from typing import Dict, List
+from typing import ClassVar, Dict, List
 
 from fastapi import WebSocket, WebSocketDisconnect
 from lnbits.helpers import urlsafe_short_hash
@@ -16,9 +16,11 @@
 
 
 class NostrRouter:
-    received_subscription_events: dict[str, List[EventMessage]]
-    received_subscription_notices: list[NoticeMessage]
-    received_subscription_eosenotices: dict[str, EndOfStoredEventsMessage]
+    received_subscription_events: ClassVar[dict[str, List[EventMessage]]] = {}
+    received_subscription_notices: ClassVar[list[NoticeMessage]] = []
+    received_subscription_eosenotices: ClassVar[dict[str, EndOfStoredEventsMessage]] = (
+        {}
+    )
 
     def __init__(self, websocket: WebSocket):
         self.connected: bool = True
@@ -75,6 +77,7 @@ async def _nostr_to_client(self):
                 self._handle_notices()
             except Exception as e:
                 logger.debug(f"Failed to handle response for client: '{e!s}'.")
+                await asyncio.sleep(1)
             await asyncio.sleep(0.1)
 
     async def _handle_subscriptions(self):