diff --git a/src/AmsToMqttBridge.ino b/src/AmsToMqttBridge.ino
index 2c6674ef..c9d002ea 100644
--- a/src/AmsToMqttBridge.ino
+++ b/src/AmsToMqttBridge.ino
@@ -17,6 +17,7 @@
  */
 
 #include "AmsToMqttBridge.h"
+#define ARDUINOJSON_POSITIVE_EXPONENTIATION_THRESHOLD 1e9
 #include <ArduinoJson.h>
 #include <MQTT.h>
 #include <DNSServer.h>