diff --git a/README.md b/README.md
index e1a143b..202f2a3 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ Use the Arduino guide for details on how to installing and manage libraries http
 **Packages** -- the following packages and libraries are used (download and install):  
 ESP8266WiFi.h  
 ESP8266WebServer.h  
-ArduinoJson.h  --> https://github.com/bblanchon/ArduinoJson  
+ArduinoJson.h  --> https://github.com/bblanchon/ArduinoJson (Version 5.13.X)  
 WiFiManager.h --> https://github.com/tzapu/WiFiManager  
 ESP8266mDNS.h  
 ArduinoOTA.h  --> Arduino OTA Library