diff --git a/pycrdt_websocket/yroom.py b/pycrdt_websocket/yroom.py
index 46c0085..528fb45 100644
--- a/pycrdt_websocket/yroom.py
+++ b/pycrdt_websocket/yroom.py
@@ -307,7 +307,7 @@ async def serve(self, websocket: Websocket):
         except Exception as exception:
             self._handle_exception(exception)
 
-    def local_update_awareness(self, type: str, changes: dict[str, Any]) -> None:
+    def local_update_awareness(self, type: str, changes: tuple[dict[str, Any], Any]) -> None:
         """
         Callback to broadcast the server awareness to clients.
         """