diff --git a/contracts/erc1155/contracts/src/ERC1155.sol b/contracts/erc1155/contracts/src/ERC1155.sol
index 97cc5761b7..335d4e27b6 100644
--- a/contracts/erc1155/contracts/src/ERC1155.sol
+++ b/contracts/erc1155/contracts/src/ERC1155.sol
@@ -19,7 +19,7 @@
 pragma solidity ^0.5.5;
 
 import "@0x/contracts-utils/contracts/src/SafeMath.sol";
-import "@0x/contracts-utils/contracts/src/Address.sol";
+import "@0x/contracts-utils/contracts/src/LibAddress.sol";
 import "./interfaces/IERC1155.sol";
 import "./interfaces/IERC1155Receiver.sol";
 import "./MixinNonFungibleToken.sol";
@@ -30,7 +30,7 @@ contract ERC1155 is
     IERC1155,
     MixinNonFungibleToken
 {
-    using Address for address;
+    using LibAddress for address;
 
     // selectors for receiver callbacks
     bytes4 constant public ERC1155_RECEIVED       = 0xf23a6e61;
@@ -97,7 +97,7 @@ contract ERC1155 is
         emit TransferSingle(msg.sender, from, to, id, value);
 
         // if `to` is a contract then trigger its callback
-        if (to._isContract()) {
+        if (to.isContract()) {
             bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155Received(
                 msg.sender,
                 from,
@@ -177,7 +177,7 @@ contract ERC1155 is
         emit TransferBatch(msg.sender, from, to, ids, values);
 
         // if `to` is a contract then trigger its callback
-        if (to._isContract()) {
+        if (to.isContract()) {
             bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155BatchReceived(
                 msg.sender,
                 from,
diff --git a/contracts/erc1155/contracts/src/ERC1155Mintable.sol b/contracts/erc1155/contracts/src/ERC1155Mintable.sol
index e09fc0bd6c..7ef0a560b5 100644
--- a/contracts/erc1155/contracts/src/ERC1155Mintable.sol
+++ b/contracts/erc1155/contracts/src/ERC1155Mintable.sol
@@ -128,7 +128,7 @@ contract ERC1155Mintable is
             );
 
             // if `to` is a contract then trigger its callback
-            if (dst._isContract()) {
+            if (dst.isContract()) {
                 bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
                     msg.sender,
                     msg.sender,
@@ -177,7 +177,7 @@ contract ERC1155Mintable is
             emit TransferSingle(msg.sender, address(0x0), dst, id, 1);
 
             // if `to` is a contract then trigger its callback
-            if (dst._isContract()) {
+            if (dst.isContract()) {
                 bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
                     msg.sender,
                     msg.sender,
diff --git a/contracts/multisig/contracts/src/AssetProxyOwner.sol b/contracts/multisig/contracts/src/AssetProxyOwner.sol
index 0447dac4d9..3426f874de 100644
--- a/contracts/multisig/contracts/src/AssetProxyOwner.sol
+++ b/contracts/multisig/contracts/src/AssetProxyOwner.sol
@@ -98,7 +98,7 @@ contract AssetProxyOwner is
     {
         Transaction storage txn = transactions[transactionId];
         txn.executed = true;
-        if (_external_call(txn.destination, txn.value, txn.data.length, txn.data)) {
+        if (_externalCall(txn.destination, txn.value, txn.data.length, txn.data)) {
             emit Execution(transactionId);
         } else {
             emit ExecutionFailure(transactionId);
diff --git a/contracts/multisig/contracts/src/MultiSigWallet.sol b/contracts/multisig/contracts/src/MultiSigWallet.sol
index e6d5e68f36..ac9022afd4 100644
--- a/contracts/multisig/contracts/src/MultiSigWallet.sol
+++ b/contracts/multisig/contracts/src/MultiSigWallet.sol
@@ -231,7 +231,7 @@ contract MultiSigWallet {
         if (isConfirmed(transactionId)) {
             Transaction storage txn = transactions[transactionId];
             txn.executed = true;
-            if (_external_call(txn.destination, txn.value, txn.data.length, txn.data))
+            if (_externalCall(txn.destination, txn.value, txn.data.length, txn.data))
                 Execution(transactionId);
             else {
                 ExecutionFailure(transactionId);
@@ -242,7 +242,7 @@ contract MultiSigWallet {
 
     // call has been separated into its own function in order to take advantage
     // of the Solidity's code generator to produce a loop that copies tx.data into memory.
-    function _external_call(address destination, uint value, uint dataLength, bytes data) internal returns (bool) {
+    function _externalCall(address destination, uint value, uint dataLength, bytes data) internal returns (bool) {
         bool result;
         assembly {
             let x := mload(0x40)   // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
diff --git a/contracts/multisig/contracts/src/MultiSigWalletWithTimeLock.sol b/contracts/multisig/contracts/src/MultiSigWalletWithTimeLock.sol
index f32a22ad04..96e388de41 100644
--- a/contracts/multisig/contracts/src/MultiSigWalletWithTimeLock.sol
+++ b/contracts/multisig/contracts/src/MultiSigWalletWithTimeLock.sol
@@ -109,7 +109,7 @@ contract MultiSigWalletWithTimeLock is
     {
         Transaction storage txn = transactions[transactionId];
         txn.executed = true;
-        if (_external_call(txn.destination, txn.value, txn.data.length, txn.data)) {
+        if (_externalCall(txn.destination, txn.value, txn.data.length, txn.data)) {
             emit Execution(transactionId);
         } else {
             emit ExecutionFailure(transactionId);
diff --git a/contracts/utils/compiler.json b/contracts/utils/compiler.json
index cb6b7be456..942d46253d 100644
--- a/contracts/utils/compiler.json
+++ b/contracts/utils/compiler.json
@@ -24,7 +24,7 @@
         }
     },
     "contracts": [
-        "src/Address.sol",
+        "src/LibAddress.sol",
         "src/LibBytes.sol",
         "src/LibEIP712.sol",
         "src/Ownable.sol",
diff --git a/contracts/utils/contracts/src/Address.sol b/contracts/utils/contracts/src/LibAddress.sol
similarity index 94%
rename from contracts/utils/contracts/src/Address.sol
rename to contracts/utils/contracts/src/LibAddress.sol
index f3c7d946ff..93552335b7 100644
--- a/contracts/utils/contracts/src/Address.sol
+++ b/contracts/utils/contracts/src/LibAddress.sol
@@ -22,7 +22,7 @@ pragma solidity ^0.5.5;
 /**
  * Utility library of inline functions on addresses
  */
-library Address {
+library LibAddress {
 
     /**
      * Returns whether the target address is a contract
@@ -31,7 +31,7 @@ library Address {
      * @param account address of the account to check
      * @return whether the target address is a contract
      */
-    function _isContract(address account) internal view returns (bool) {
+    function isContract(address account) internal view returns (bool) {
         uint256 size;
         // XXX Currently there is no better way to check if there is a contract in an address
         // than to check the size of the code at that address.
diff --git a/contracts/utils/package.json b/contracts/utils/package.json
index f3314c9ab1..acf2be9c0a 100644
--- a/contracts/utils/package.json
+++ b/contracts/utils/package.json
@@ -34,7 +34,7 @@
         "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "./generated-artifacts/@(Address|IOwnable|LibBytes|LibEIP712|Ownable|ReentrancyGuard|RichErrors|SafeMath|TestConstants|TestLibAddressArray|TestLibBytes).json",
+        "abis": "./generated-artifacts/@(LibAddress|IOwnable|LibBytes|LibEIP712|Ownable|ReentrancyGuard|RichErrors|SafeMath|TestConstants|TestLibAddressArray|TestLibBytes).json",
         "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
     },
     "repository": {
diff --git a/contracts/utils/src/artifacts.ts b/contracts/utils/src/artifacts.ts
index 9f1008b75a..bbe9c8b605 100644
--- a/contracts/utils/src/artifacts.ts
+++ b/contracts/utils/src/artifacts.ts
@@ -5,7 +5,7 @@
  */
 import { ContractArtifact } from 'ethereum-types';
 
-import * as Address from '../generated-artifacts/Address.json';
+import * as LibAddress from '../generated-artifacts/LibAddress.json';
 import * as IOwnable from '../generated-artifacts/IOwnable.json';
 import * as LibBytes from '../generated-artifacts/LibBytes.json';
 import * as LibEIP712 from '../generated-artifacts/LibEIP712.json';
@@ -17,7 +17,7 @@ import * as TestConstants from '../generated-artifacts/TestConstants.json';
 import * as TestLibAddressArray from '../generated-artifacts/TestLibAddressArray.json';
 import * as TestLibBytes from '../generated-artifacts/TestLibBytes.json';
 export const artifacts = {
-    Address: Address as ContractArtifact,
+    LibAddress: LibAddress as ContractArtifact,
     LibBytes: LibBytes as ContractArtifact,
     Ownable: Ownable as ContractArtifact,
     ReentrancyGuard: ReentrancyGuard as ContractArtifact,
diff --git a/contracts/utils/src/wrappers.ts b/contracts/utils/src/wrappers.ts
index b97fc95c2c..c2b2d10ad5 100644
--- a/contracts/utils/src/wrappers.ts
+++ b/contracts/utils/src/wrappers.ts
@@ -3,7 +3,7 @@
  * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
  * -----------------------------------------------------------------------------
  */
-export * from '../generated-wrappers/address';
+export * from '../generated-wrappers/lib_address';
 export * from '../generated-wrappers/i_ownable';
 export * from '../generated-wrappers/lib_bytes';
 export * from '../generated-wrappers/lib_e_i_p712';
diff --git a/contracts/utils/tsconfig.json b/contracts/utils/tsconfig.json
index c37381d5fa..41af80b7d6 100644
--- a/contracts/utils/tsconfig.json
+++ b/contracts/utils/tsconfig.json
@@ -3,7 +3,7 @@
     "compilerOptions": { "outDir": "lib", "rootDir": ".", "resolveJsonModule": true },
     "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
     "files": [
-        "generated-artifacts/Address.json",
+        "generated-artifacts/LibAddress.json",
         "generated-artifacts/IOwnable.json",
         "generated-artifacts/LibBytes.json",
         "generated-artifacts/LibEIP712.json",