diff --git a/README.md b/README.md
index 2f6916be..dfad4c25 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ $ ./configure --enable-wasm-simd
 [The 3-Clause BSD License](https://opensource.org/licenses/BSD-3-Clause)
 
 ```
-Copyright (c) 2021, Shiguredo Inc.
+Copyright (c) 2021-2022, Shiguredo Inc.
 Copyright (c) 2017, Mozilla
 Copyright (c) 2007-2017, Jean-Marc Valin
 Copyright (c) 2005-2017, Xiph.Org Foundation