Bump year to 2019
diff --git a/README.md b/README.md
index 26d7d89..54033a3 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@
 
 Apache header:
 
-    Copyright 2018 Google LLC
+    Copyright 2019 Google LLC
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.