diff --git a/common/utils/__init__.py b/common/utils/__init__.py
index e69de29..b0fb0b2 100644
--- a/common/utils/__init__.py
+++ b/common/utils/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
diff --git a/common/utils/deferred_utils.py b/common/utils/deferred_utils.py
index 30e773a..3c55c1a 100644
--- a/common/utils/deferred_utils.py
+++ b/common/utils/deferred_utils.py
@@ -1,3 +1,16 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
 from twisted.internet import reactor
 from twisted.internet.defer import Deferred
 from twisted.internet.error import AlreadyCalled
diff --git a/common/utils/indexpool.py b/common/utils/indexpool.py
index d85d1ef..858cb3a 100644
--- a/common/utils/indexpool.py
+++ b/common/utils/indexpool.py
@@ -1,3 +1,16 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
 from bitstring import BitArray
 import structlog
 
diff --git a/common/utils/json_format.py b/common/utils/json_format.py
index d1672e4..c18d013 100644
--- a/common/utils/json_format.py
+++ b/common/utils/json_format.py
@@ -1,3 +1,16 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
 """
 Monkey patched json_format to allow best effort decoding of Any fields.
 Use the additional flag (strict_any_handling=False) to trigger the