diff --git a/README.md b/README.md
index 222acc5..5a2642f 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@ A Scheme-like typesetting LISP interpreter and editor that using SILE typesettin
 ## Screenshot
 ![圖片](https://user-images.githubusercontent.com/184107/122680547-47c8e000-d222-11eb-8ac3-be02df28e4b0.png)
 
-
+## License
+GPLv3
 
 ## Dependencies
 * Python3