diff --git a/osbenchmark/client.py b/osbenchmark/client.py
index e1d71001..90bfa92e 100644
--- a/osbenchmark/client.py
+++ b/osbenchmark/client.py
@@ -363,11 +363,11 @@ async def on_request_end(session, trace_config_ctx, params):
 
         class BenchmarkAsyncOpenSearch(opensearchpy.AsyncOpenSearch, RequestContextHolder):
             print("benchmark###################")
-            async def __aenter__(self) -> Any:
+            async def __aenter__(self):
                 print("enter###############")
                 return self
 
-            async def __aexit__(self, *_: Any) -> None:
+            async def __aexit__(self, *_):
                 print("exit###############")
                 await self.close()
             #pass