Fix copyrights
diff --git a/test/cpp/interop/server_helper.h b/test/cpp/interop/server_helper.h
index 12865e4..38c2fba 100644
--- a/test/cpp/interop/server_helper.h
+++ b/test/cpp/interop/server_helper.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without