diff --git a/LICENSE b/LICENSE
index f8f56d9..11c0769 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Shohei Ueda (peaceiris)
+Copyright (c) 2019 Shohei Ueda (peaceiris)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal