diff --git a/contracts/interchain-token/ERC20.sol b/contracts/interchain-token/ERC20.sol
index 71b7f10d..722021e0 100644
--- a/contracts/interchain-token/ERC20.sol
+++ b/contracts/interchain-token/ERC20.sol
@@ -34,7 +34,7 @@ contract ERC20 is IERC20 {
     mapping(address => mapping(address => uint256)) public override allowance;
 
     uint256 public override totalSupply;
-    uint256 internal constant UINT256_MAX = 2 ** 256 - 1;
+    uint256 internal constant UINT256_MAX = type(uint256).max;
 
     /**
      * @dev See {IERC20-transfer}.
diff --git a/contracts/token-manager/TokenManager.sol b/contracts/token-manager/TokenManager.sol
index b99ae0ef..2db0eaa4 100644
--- a/contracts/token-manager/TokenManager.sol
+++ b/contracts/token-manager/TokenManager.sol
@@ -21,7 +21,7 @@ contract TokenManager is ITokenManager, Operator, FlowLimit, Implementation {
     using AddressBytes for bytes;
     using SafeTokenCall for IERC20;
 
-    uint256 internal constant UINT256_MAX = 2 ** 256 - 1;
+    uint256 internal constant UINT256_MAX = type(uint256).max;
 
     address public immutable interchainTokenService;