diff --git a/YD_AllHeartRates.Api/appsettings.json b/YD_AllHeartRates.Api/appsettings.json
index ab124e3..5948be5 100644
--- a/YD_AllHeartRates.Api/appsettings.json
+++ b/YD_AllHeartRates.Api/appsettings.json
@@ -43,6 +43,6 @@
     "Host": "8.153.108.90",
     "Port": 1883,
     "Topic": "heartrates/topic",
-    "BatchSize": 10
+    "BatchSize": 1
   }
 }