diff --git a/zipline/finance/trading.py b/zipline/finance/trading.py
index 97c97c00..f282c378 100644
--- a/zipline/finance/trading.py
+++ b/zipline/finance/trading.py
@@ -1,5 +1,5 @@
 #
-# Copyright 2012 Quantopian, Inc.
+# Copyright 2013 Quantopian, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.