diff --git a/src/ProxyFactory.sol b/src/ProxyFactory.sol
index c925f64..c40a144 100644
--- a/src/ProxyFactory.sol
+++ b/src/ProxyFactory.sol
@@ -67,6 +67,8 @@ contract ProxyFactory is Ownable, EIP712 {
     /////// State Variables ////////
     ////////////////////////////////
     // contest distribution expiration
+    bytes32 internal constant _DEPLOY_AND_DISTRIBUTE_TYPEHASH =
+        keccak256("DeployAndDistribute(bytes32 contestId,address implementation,bytes data)");
     uint256 public constant EXPIRATION_TIME = 7 days;
     uint256 public constant MAX_CONTEST_PERIOD = 28 days;
 
@@ -163,7 +165,8 @@ contract ProxyFactory is Ownable, EIP712 {
         bytes calldata signature,
         bytes calldata data
     ) public returns (address) {
-        bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(contestId, implementation, data)));
+        bytes32 digest =
+            _hashTypedDataV4(keccak256(abi.encode(_DEPLOY_AND_DISTRIBUTE_TYPEHASH, contestId, implementation, data)));
         if (!organizer.isValidSignatureNow(digest, signature)) revert ProxyFactory__InvalidSignature();
         bytes32 salt = _calculateSalt(organizer, contestId, implementation);
         if (saltToCloseTime[salt] == 0) revert ProxyFactory__ContestIsNotRegistered();
@@ -257,7 +260,7 @@ contract ProxyFactory is Ownable, EIP712 {
     /// @param proxy The proxy address
     /// @param data The prize distribution data
     function _distribute(address proxy, bytes calldata data) internal {
-        if (proxy.code.length  == 0) revert ProxyFactory__ProxyIsNotAContract();
+        if (proxy.code.length == 0) revert ProxyFactory__ProxyIsNotAContract();
         (bool success,) = proxy.call(data);
         if (!success) revert ProxyFactory__DelegateCallFailed();
         emit Distributed(proxy, data);
diff --git a/test/integration/HelperContract.t.sol b/test/integration/HelperContract.t.sol
index 09ee984..79bf77a 100644
--- a/test/integration/HelperContract.t.sol
+++ b/test/integration/HelperContract.t.sol
@@ -51,6 +51,10 @@ abstract contract HelperContract is Test {
 
     // test signer's key pair when testing meta tx
     // **these are all for test. should never use these in production**
+    // bytes32 internal constant _DEPLOY_AND_DISTRIBUTE_TYPEHASH =
+        // keccak256("DeployAndDistribute(bytes32 contestId,bytes data)");
+    bytes32 internal constant _DEPLOY_AND_DISTRIBUTE_TYPEHASH =
+        keccak256("DeployAndDistribute(bytes32 contestId,address implementation,bytes data)");
     uint256 public constant TEST_SIGNER_KEY = 0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d;
     address public constant TEST_SIGNER = 0x70997970C51812dc3A010C7d01b50e0d17dc79C8;
     uint256 public constant TEST_SIGNER_KEY2 = 0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a;
diff --git a/test/integration/ProxyFactoryTest.t.sol b/test/integration/ProxyFactoryTest.t.sol
index 27c24a5..b319892 100644
--- a/test/integration/ProxyFactoryTest.t.sol
+++ b/test/integration/ProxyFactoryTest.t.sol
@@ -777,7 +777,7 @@ contract ProxyFactoryTest is StdCheats, HelperContract {
         );
         bytes32 randomId_ = keccak256(abi.encode("Jason", "001"));
         bytes memory sendingData = createData();
-        bytes32 data = keccak256(abi.encode(randomId_,  address(distributor),  sendingData));
+        bytes32 data = keccak256(abi.encode(_DEPLOY_AND_DISTRIBUTE_TYPEHASH, randomId_,address(distributor), sendingData));
         bytes32 digest = ECDSA.toTypedDataHash(domainSeparatorV4, data);
         (uint8 v, bytes32 r, bytes32 s) = vm.sign(privateK, digest);
         bytes memory signature = abi.encodePacked(r, s, v);