diff --git a/library.properties b/library.properties
index e6c6290..9547862 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ESP32_LoRaWAN
-version=Internal RTC2.0
+version=2.1.1
 author=HelTec
 maintainer=Harry <harry@heltec.cn>
 sentence=LoRaWAN library for ESP32 + LoRa boards made by heltec