diff --git a/contracts/erc1155/contracts/src/utils/Address.sol b/contracts/erc1155/contracts/src/utils/Address.sol
index 54f1431754..92b5295e64 100644
--- a/contracts/erc1155/contracts/src/utils/Address.sol
+++ b/contracts/erc1155/contracts/src/utils/Address.sol
@@ -1,3 +1,21 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  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.
+
+*/
+
 pragma solidity ^0.5.3;
 
 
diff --git a/contracts/erc1155/contracts/src/utils/SafeMath.sol b/contracts/erc1155/contracts/src/utils/SafeMath.sol
index 82a5d5d765..4ae314fdcb 100644
--- a/contracts/erc1155/contracts/src/utils/SafeMath.sol
+++ b/contracts/erc1155/contracts/src/utils/SafeMath.sol
@@ -1,3 +1,21 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  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.
+
+*/
+
 pragma solidity ^0.5.3;