diff --git a/lib/server.py b/lib/server.py
index 25250ea..def7340 100644
--- a/lib/server.py
+++ b/lib/server.py
@@ -53,7 +53,7 @@ def start_server(backend: Backend, routes: List[web.RouteDef], **kwargs):
             try:
                 while True:
                     metrics._model_errored(err_msg)
-                    await metrics.__send_metrics_and_reset() 
+                    await metrics._Metrics__send_metrics_and_reset()
                     await asyncio.sleep(10)
             finally:
                 await metrics.aclose()