diff --git a/zipline/utils/serialization_utils.py b/zipline/utils/serialization_utils.py
index 60ba5845..1fd948e5 100644
--- a/zipline/utils/serialization_utils.py
+++ b/zipline/utils/serialization_utils.py
@@ -1,3 +1,18 @@
+#
+# Copyright 2015 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Label for the serialization version field in the state returned by
 # __getstate__.
 VERSION_LABEL = '_stateversion_'