Update copyrights
diff --git a/src/python/grpcio/precompiled.py b/src/python/grpcio/precompiled.py
index d34250b..3cf0ded 100644
--- a/src/python/grpcio/precompiled.py
+++ b/src/python/grpcio/precompiled.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without