diff --git a/contracts/exchange-libs/contracts/src/LibAbiEncoder.sol b/contracts/exchange-libs/contracts/src/LibAbiEncoder.sol
index 5422bfeecf..b8b72ba8eb 100644
--- a/contracts/exchange-libs/contracts/src/LibAbiEncoder.sol
+++ b/contracts/exchange-libs/contracts/src/LibAbiEncoder.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 pragma experimental ABIEncoderV2;
 
 import "./LibOrder.sol";
diff --git a/contracts/exchange-libs/contracts/src/LibAssetProxyErrors.sol b/contracts/exchange-libs/contracts/src/LibAssetProxyErrors.sol
index 96c48b5e3b..3f6ae1f31f 100644
--- a/contracts/exchange-libs/contracts/src/LibAssetProxyErrors.sol
+++ b/contracts/exchange-libs/contracts/src/LibAssetProxyErrors.sol
@@ -17,7 +17,7 @@
 */
 
 // solhint-disable
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 /// @dev This contract documents the revert reasons used in the AssetProxy contracts.
diff --git a/contracts/exchange-libs/contracts/src/LibConstants.sol b/contracts/exchange-libs/contracts/src/LibConstants.sol
index 3efa3e1b35..2889ffd5d4 100644
--- a/contracts/exchange-libs/contracts/src/LibConstants.sol
+++ b/contracts/exchange-libs/contracts/src/LibConstants.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 // solhint-disable max-line-length
diff --git a/contracts/exchange-libs/contracts/src/LibEIP712.sol b/contracts/exchange-libs/contracts/src/LibEIP712.sol
index 3a85ab3c0a..e8b71a5091 100644
--- a/contracts/exchange-libs/contracts/src/LibEIP712.sol
+++ b/contracts/exchange-libs/contracts/src/LibEIP712.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract LibEIP712 {
@@ -50,7 +50,7 @@ contract LibEIP712 {
             EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
             keccak256(bytes(EIP712_DOMAIN_NAME)),
             keccak256(bytes(EIP712_DOMAIN_VERSION)),
-            bytes32(address(this))
+            uint256(address(this))
         ));
     }
 
diff --git a/contracts/exchange-libs/contracts/src/LibExchangeErrors.sol b/contracts/exchange-libs/contracts/src/LibExchangeErrors.sol
index a160242c9b..5818cb6e21 100644
--- a/contracts/exchange-libs/contracts/src/LibExchangeErrors.sol
+++ b/contracts/exchange-libs/contracts/src/LibExchangeErrors.sol
@@ -17,7 +17,7 @@
 */
 
 // solhint-disable
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 /// @dev This contract documents the revert reasons used in the Exchange contract.
diff --git a/contracts/exchange-libs/contracts/src/LibExchangeSelectors.sol b/contracts/exchange-libs/contracts/src/LibExchangeSelectors.sol
index 71640c609b..792a564356 100644
--- a/contracts/exchange-libs/contracts/src/LibExchangeSelectors.sol
+++ b/contracts/exchange-libs/contracts/src/LibExchangeSelectors.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract LibExchangeSelectors {
diff --git a/contracts/exchange-libs/contracts/src/LibFillResults.sol b/contracts/exchange-libs/contracts/src/LibFillResults.sol
index 08a1649b86..f4b9626b0b 100644
--- a/contracts/exchange-libs/contracts/src/LibFillResults.sol
+++ b/contracts/exchange-libs/contracts/src/LibFillResults.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "@0x/contracts-utils/contracts/src/SafeMath.sol";
 
diff --git a/contracts/exchange-libs/contracts/src/LibMath.sol b/contracts/exchange-libs/contracts/src/LibMath.sol
index 24ea90c6b9..2a7b388821 100644
--- a/contracts/exchange-libs/contracts/src/LibMath.sol
+++ b/contracts/exchange-libs/contracts/src/LibMath.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "@0x/contracts-utils/contracts/src/SafeMath.sol";
 
diff --git a/contracts/exchange-libs/contracts/src/LibOrder.sol b/contracts/exchange-libs/contracts/src/LibOrder.sol
index fcf5da5fb6..d23747c36e 100644
--- a/contracts/exchange-libs/contracts/src/LibOrder.sol
+++ b/contracts/exchange-libs/contracts/src/LibOrder.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "./LibEIP712.sol";
 
diff --git a/contracts/exchange-libs/contracts/test/TestLibs.sol b/contracts/exchange-libs/contracts/test/TestLibs.sol
index 751a3773ec..f17407b78a 100644
--- a/contracts/exchange-libs/contracts/test/TestLibs.sol
+++ b/contracts/exchange-libs/contracts/test/TestLibs.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.24;
+pragma solidity 0.5.3;
 pragma experimental ABIEncoderV2;
 
 import "../src/LibMath.sol";
diff --git a/contracts/utils/contracts/src/LibAddressArray.sol b/contracts/utils/contracts/src/LibAddressArray.sol
index 892c486f14..aa3ef27dfb 100644
--- a/contracts/utils/contracts/src/LibAddressArray.sol
+++ b/contracts/utils/contracts/src/LibAddressArray.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "./LibBytes.sol";
 
@@ -31,7 +31,7 @@ library LibAddressArray {
     /// @return Array of addresses: [... addressArray, addressToAppend]
     function append(address[] memory addressArray, address addressToAppend) 
         internal pure
-        returns (address[])
+        returns (address[] memory)
     {
         // Get stats on address array and free memory
         uint256 freeMemPtr = 0;
diff --git a/contracts/utils/contracts/src/LibBytes.sol b/contracts/utils/contracts/src/LibBytes.sol
index 4ee6228d54..1fa56786da 100644
--- a/contracts/utils/contracts/src/LibBytes.sol
+++ b/contracts/utils/contracts/src/LibBytes.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 library LibBytes {
diff --git a/contracts/utils/contracts/src/Ownable.sol b/contracts/utils/contracts/src/Ownable.sol
index f67f241a4f..254986e088 100644
--- a/contracts/utils/contracts/src/Ownable.sol
+++ b/contracts/utils/contracts/src/Ownable.sol
@@ -1,4 +1,4 @@
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "./interfaces/IOwnable.sol";
 
diff --git a/contracts/utils/contracts/src/ReentrancyGuard.sol b/contracts/utils/contracts/src/ReentrancyGuard.sol
index 1a02c88a40..9574d07a12 100644
--- a/contracts/utils/contracts/src/ReentrancyGuard.sol
+++ b/contracts/utils/contracts/src/ReentrancyGuard.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract ReentrancyGuard {
diff --git a/contracts/utils/contracts/src/SafeMath.sol b/contracts/utils/contracts/src/SafeMath.sol
index d7a4a603eb..82a5d5d765 100644
--- a/contracts/utils/contracts/src/SafeMath.sol
+++ b/contracts/utils/contracts/src/SafeMath.sol
@@ -1,4 +1,4 @@
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract SafeMath {
diff --git a/contracts/utils/contracts/src/interfaces/IOwnable.sol b/contracts/utils/contracts/src/interfaces/IOwnable.sol
index c0cbfddfd6..b5de687439 100644
--- a/contracts/utils/contracts/src/interfaces/IOwnable.sol
+++ b/contracts/utils/contracts/src/interfaces/IOwnable.sol
@@ -1,4 +1,4 @@
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract IOwnable {
diff --git a/contracts/utils/contracts/test/TestConstants.sol b/contracts/utils/contracts/test/TestConstants.sol
index bf98bafefe..d58fe535a4 100644
--- a/contracts/utils/contracts/test/TestConstants.sol
+++ b/contracts/utils/contracts/test/TestConstants.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "../src/LibBytes.sol";
 
diff --git a/contracts/utils/contracts/test/TestLibBytes.sol b/contracts/utils/contracts/test/TestLibBytes.sol
index cd6b1456de..82ad314fb5 100644
--- a/contracts/utils/contracts/test/TestLibBytes.sol
+++ b/contracts/utils/contracts/test/TestLibBytes.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "../src/LibBytes.sol";
 
@@ -244,14 +244,14 @@ contract TestLibBytes {
     /// @param length Length of bytes to copy from <source> to <dest>
     /// @return mem Memory contents after calling memCopy.
     function testMemcpy(
-        bytes mem,
+        bytes memory mem,
         uint256 dest,
         uint256 source,
         uint256 length
     )
         public // not external, we need input in memory
         pure
-        returns (bytes)
+        returns (bytes memory)
     {
         // Sanity check. Overflows are not checked.
         require(source + length <= mem.length);
diff --git a/yarn.lock b/yarn.lock
index 3360084f2a..46b21e9f5d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1597,7 +1597,7 @@
   version "2.2.48"
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-2.2.48.tgz#3523b126a0b049482e1c3c11877460f76622ffab"
 
-"@types/node@*", "@types/node@^10.3.2":
+"@types/node@*", "@types/node@10.9.4", "@types/node@^10.3.2":
   version "10.9.4"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.9.4.tgz#0f4cb2dc7c1de6096055357f70179043c33e9897"
 
@@ -13478,13 +13478,6 @@ react-copy-to-clipboard@^5.0.0:
     copy-to-clipboard "^3"
     prop-types "^15.5.8"
 
-react-document-title@^2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/react-document-title/-/react-document-title-2.0.3.tgz#bbf922a0d71412fc948245e4283b2412df70f2b9"
-  dependencies:
-    prop-types "^15.5.6"
-    react-side-effect "^1.0.2"
-
 react-dom@^16.3.2:
   version "16.4.2"
   resolved "https://registry.npmjs.org/react-dom/-/react-dom-16.4.2.tgz#4afed569689f2c561d2b8da0b819669c38a0bda4"
@@ -13706,7 +13699,7 @@ react-scrollable-anchor@^0.6.1:
     jump.js "1.0.1"
     prop-types "^15.5.10"
 
-react-side-effect@^1.0.2, react-side-effect@^1.1.0:
+react-side-effect@^1.1.0:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/react-side-effect/-/react-side-effect-1.1.5.tgz#f26059e50ed9c626d91d661b9f3c8bb38cd0ff2d"
   dependencies: