diff --git a/README.md b/README.md
index ed1424b..0b54b0b 100644
--- a/README.md
+++ b/README.md
@@ -285,6 +285,6 @@ License
 These codes are licensed by [SUSHI-WARE](https://github.com/MakeNowJust/sushi-ware) license
 [![SUSHI-WARE LICENSE](https://img.shields.io/badge/license-SUSHI--WARE%F0%9F%8D%A3-blue.svg)](https://github.com/MakeNowJust/sushi-ware)
 
-(C) 2014-2017 TSUYUSATO "MakeNowJust" Kitsune
+(C) 2014-2018 TSUYUSATO "MakeNowJust" Kitsune
 
 [@MakeNowJust]: https://github.com/MakeNowJust