diff --git a/include/picrin.h b/include/picrin.h
index e9d8ab8b..9ac915b2 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2012-2013 Yuichi Nishiwaki and other picrin contributors.
+ * Copyright (c) 2013-2014 Yuichi Nishiwaki and other picrin contributors.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the