diff --git a/contracts/iotube/TokenCashierForSolana.sol b/contracts/iotube/TokenCashierForSolana.sol
index dd23a51..cf1511f 100644
--- a/contracts/iotube/TokenCashierForSolana.sol
+++ b/contracts/iotube/TokenCashierForSolana.sol
@@ -12,7 +12,7 @@ interface IWrappedCoin {
     function deposit() external payable;
 }
 
-contract TokenCashier is Pausable {
+contract TokenCashierForSolana is Pausable {
     event Receipt(
         address indexed token,
         uint256 indexed id,
diff --git a/contracts/iotube/TransferValidatorForSolana.sol b/contracts/iotube/TransferValidatorForSolana.sol
index edfd576..9baf72c 100644
--- a/contracts/iotube/TransferValidatorForSolana.sol
+++ b/contracts/iotube/TransferValidatorForSolana.sol
@@ -14,7 +14,7 @@ interface IMinter {
     function owner() external view returns (address);
 }
 
-contract TransferValidator is Pausable {
+contract TransferValidatorForSolana is Pausable {
     event Settled(bytes32 indexed key, address[] witnesses);
 
     mapping(bytes32 => uint256) public settles;