diff --git a/gateway/include/Protocol_2.h b/gateway/include/Protocol_2.h
index 34cfad6..0e32a85 100644
--- a/gateway/include/Protocol_2.h
+++ b/gateway/include/Protocol_2.h
@@ -25,7 +25,7 @@ public:
         default:
             StaticJsonDocument<200> jsonSensor;
             if (buildSensorJson(value, jsonSensor)) {
-                jsonDoc.add(jsonSensor);
+                jsonDoc.set(jsonSensor);
             } else {
                 Protocol::toJson(value, jsonDoc);
             }