diff --git a/README.asc b/README.asc
index 49a47d4..1c95d4f 100644
--- a/README.asc
+++ b/README.asc
@@ -8,10 +8,11 @@ User Forum], not to this repo.
 
 == License
 
-FatFs module is a free software that opened under license policy of
-following conditions.
+Copyright (C) 2022, ChaN, all right reserved.
 
-Copyright (C) 2015, ChaN, all right reserved.
+FatFs module is an open source software. Redistribution and use of FatFs in
+source and binary forms, with or without modification, are permitted provided
+that the following condition is met:
 
 1. Redistributions of source code must retain the above copyright notice,
    this condition and the following disclaimer.