diff --git a/contracts/Keep3r.sol b/contracts/Keep3r.sol
index 2e4a5af..160cca8 100644
--- a/contracts/Keep3r.sol
+++ b/contracts/Keep3r.sol
@@ -561,14 +561,14 @@ contract Keep3rV1 is ReentrancyGuard {
     mapping (address => uint) internal balances;
 
     /// @notice The EIP-712 typehash for the contract's domain
-    bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint chainId,address verifyingContract)");
+    bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
     bytes32 public immutable DOMAINSEPARATOR;
 
     /// @notice The EIP-712 typehash for the delegation struct used by the contract
-    bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint nonce,uint expiry)");
+    bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
 
     /// @notice The EIP-712 typehash for the permit struct used by the contract
-    bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint value,uint nonce,uint deadline)");
+    bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
 
 
     /// @notice A record of states for signing / validating signatures