diff --git a/LICENSE b/LICENSE
index c3510b2..7efa8fd 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2021 yhirose
+Copyright (c) 2022 yhirose
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index c0abb30..9b9c320 100644
--- a/README.md
+++ b/README.md
@@ -713,11 +713,10 @@ Sample codes
   * [Calculator (AST version)](https://github.com/yhirose/cpp-peglib/blob/master/example/calc3.cc)
   * [Calculator (parsing expressions by precedence climbing)](https://github.com/yhirose/cpp-peglib/blob/master/example/calc4.cc)
   * [Calculator (AST version and parsing expressions by precedence climbing)](https://github.com/yhirose/cpp-peglib/blob/master/example/calc5.cc)
-  * [PL/0 language example](https://github.com/yhirose/cpp-peglib/blob/master/pl0/pl0.cc)
-  * [A tiny PL/0 JIT compiler in less than 700 LOC with LLVM and PEG parser](https://github.com/yhirose/pl0-jit-compiler)
+  * [A tiny PL/0 JIT compiler in less than 900 LOC with LLVM and PEG parser](https://github.com/yhirose/pl0-jit-compiler)
   * [A Programming Language just for writing Fizz Buzz program. :)](https://github.com/yhirose/fizzbuzzlang)
 
 License
 -------
 
-MIT license (© 2021 Yuji Hirose)
+MIT license (© 2022 Yuji Hirose)
diff --git a/pl0/pl0.cc b/pl0/pl0.cc
index 6ce8544..fb868ca 100644
--- a/pl0/pl0.cc
+++ b/pl0/pl0.cc
@@ -1,7 +1,7 @@
 //
 //  pl0.cc - PL/0 language (https://en.wikipedia.org/wiki/PL/0)
 //
-//  Copyright (c) 2020 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2022 Yuji Hirose. All rights reserved.
 //  MIT License
 //