diff --git a/library.properties b/library.properties
index b4c7388..35b5fd3 100644
--- a/library.properties
+++ b/library.properties
@@ -8,3 +8,4 @@ category=Device Control
 url=https://github.com/sui77/rc-switch
 architectures=avr,esp8266,esp32
 includes=RCSwitch.h
+license=LGPL-2.1-or-later