diff --git a/v2/contracts/evm/GatewayEVM.sol b/v2/contracts/evm/GatewayEVM.sol
index c690aaf2..51e53279 100644
--- a/v2/contracts/evm/GatewayEVM.sol
+++ b/v2/contracts/evm/GatewayEVM.sol
@@ -42,8 +42,8 @@ contract GatewayEVM is
     bytes32 public constant ASSET_HANDLER_ROLE = keccak256("ASSET_HANDLER_ROLE");
     /// @notice New role identifier for pauser role.
     bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
-    /// @notice Max payload size.
-    uint256 public constant MAX_PAYLOAD_SIZE = 512;
+    /// @notice Max size of payload + revertOptions revert message.
+    uint256 public constant MAX_PAYLOAD_SIZE = 1024;
 
     /// @custom:oz-upgrades-unsafe-allow constructor
     constructor() {
diff --git a/v2/contracts/zevm/GatewayZEVM.sol b/v2/contracts/zevm/GatewayZEVM.sol
index 035c26e5..dc00d328 100644
--- a/v2/contracts/zevm/GatewayZEVM.sol
+++ b/v2/contracts/zevm/GatewayZEVM.sol
@@ -36,8 +36,8 @@ contract GatewayZEVM is
     /// @notice New role identifier for pauser role.
     bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
 
-    /// @notice Max message size.
-    uint256 public constant MAX_MESSAGE_SIZE = 512;
+    /// @notice Max size of message + revertOptions revert message.
+    uint256 public constant MAX_MESSAGE_SIZE = 1024;
 
     /// @dev Only protocol address allowed modifier.
     modifier onlyProtocol() {
diff --git a/v2/test/GatewayEVM.t.sol b/v2/test/GatewayEVM.t.sol
index 60b02ffa..fdd5ebe9 100644
--- a/v2/test/GatewayEVM.t.sol
+++ b/v2/test/GatewayEVM.t.sol
@@ -509,8 +509,8 @@ contract GatewayEVMInboundTest is Test, IGatewayEVMErrors, IGatewayEVMEvents, IR
 
     function testDepositERC20ToCustodyWithPayloadFailsIfPayloadSizeExceeded() public {
         uint256 amount = 100_000;
-        bytes memory payload = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory payload = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
 
         token.approve(address(gateway), amount);
 
@@ -571,8 +571,8 @@ contract GatewayEVMInboundTest is Test, IGatewayEVMErrors, IGatewayEVMEvents, IR
 
     function testDepositEthToTssWithPayloadFailsIfPayloadSizeExceeded() public {
         uint256 amount = 100_000;
-        bytes memory payload = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory payload = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
 
         vm.expectRevert(PayloadSizeExceeded.selector);
         gateway.depositAndCall{ value: amount }(destination, payload, revertOptions);
@@ -603,8 +603,8 @@ contract GatewayEVMInboundTest is Test, IGatewayEVMErrors, IGatewayEVMEvents, IR
     }
 
     function testCallWithPayloadFailsIfPayloadSizeExceeded() public {
-        bytes memory payload = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory payload = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
 
         vm.expectRevert(PayloadSizeExceeded.selector);
         gateway.call(destination, payload, revertOptions);
diff --git a/v2/test/GatewayZEVM.t.sol b/v2/test/GatewayZEVM.t.sol
index d2b153f1..0016d004 100644
--- a/v2/test/GatewayZEVM.t.sol
+++ b/v2/test/GatewayZEVM.t.sol
@@ -153,8 +153,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testWithdrawAndCallZRC20FailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
 
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.withdrawAndCall(abi.encodePacked(addr1), 1, address(zrc20), message, 1, revertOptions);
@@ -222,8 +222,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testWithdrawAndCallZRC20WithCallOptsFailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.withdrawAndCall(abi.encodePacked(addr1), 1, address(zrc20), message, callOptions, revertOptions);
     }
@@ -301,8 +301,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testWithdrawAndCallZETAFailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.withdrawAndCall(abi.encodePacked(addr1), 1, 1, message, revertOptions);
     }
@@ -320,8 +320,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testWithdrawAndCallZETAWithCallOptsFailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.withdrawAndCall(abi.encodePacked(addr1), 1, 1, message, callOptions, revertOptions);
     }
@@ -538,8 +538,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testCallFailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.call(abi.encodePacked(addr1), address(zrc20), message, 1, revertOptions);
     }
@@ -565,8 +565,8 @@ contract GatewayZEVMInboundTest is Test, IGatewayZEVMEvents, IGatewayZEVMErrors
     }
 
     function testCallWithCallOptsFailsIfMessageSizeExceeded() public {
-        bytes memory message = new bytes(256);
-        revertOptions.revertMessage = new bytes(256);
+        bytes memory message = new bytes(512);
+        revertOptions.revertMessage = new bytes(512);
         vm.expectRevert(MessageSizeExceeded.selector);
         gateway.call(abi.encodePacked(addr1), address(zrc20), message, callOptions, revertOptions);
     }