diff --git a/LICENSE b/LICENSE
index 45832a0..1b37e69 100755
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Koyanagi Hitoshi
+Copyright (c) 2019 - 2020 Koyanagi Hitoshi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal