diff --git a/platformio.ini b/platformio.ini
index 14ab23c..d251e3a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -26,4 +26,6 @@ lib_deps =
 
     contrem/arduino-timer@^3.0.1
 
+    ArduinoJson=https://github.com/bblanchon/ArduinoJson#v7.0.0
+
     RFPowerView=https://git.mattway.com.au/matt/RFPowerView.git
diff --git a/src/main.cpp b/src/main.cpp
index 44c841a..a3b76ae 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,7 @@
 #include <Arduino.h>
 #include <EspMQTTClient.h>
 #include <arduino-timer.h>
+#include <ArduinoJson.h>
 #include <RFPowerView.h>
 #include "secrets.h"