diff --git a/src/string_util.rs b/src/string_util.rs
index 37e8da5..609aa16 100644
--- a/src/string_util.rs
+++ b/src/string_util.rs
@@ -1,4 +1,3 @@
-// Copyright (C) 2009 The Libphonenumber Authors
 // Copyright (C) 2025 The Kashin Vladislav (Rust adaptation author)
 //
 // Licensed under the Apache License, Version 2.0 (the "License");