diff --git a/src/main/resources/YangLexer.g4 b/src/main/resources/YangLexer.g4
index 12bb19b..da20fd8 100644
--- a/src/main/resources/YangLexer.g4
+++ b/src/main/resources/YangLexer.g4
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Open Networking Laboratory
+ * Copyright 2016-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.