diff --git a/contracts/staking/Vester.sol b/contracts/staking/Vester.sol
index 81ef8f2..487dc0b 100644
--- a/contracts/staking/Vester.sol
+++ b/contracts/staking/Vester.sol
@@ -15,7 +15,6 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
   string public name;
   string public symbol;
   uint8 public decimals = 18;
-  // remove?
   uint256 public vestingDuration;
   address public esToken;
   address public pairToken;
@@ -25,6 +24,7 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
 
   uint256 public override totalSupply;
   uint256 public pairSupply;
+  bool public needCheckStake;
 
   mapping(address account => uint256 amount) public balances;
   mapping(address account => uint256 amount) public override pairAmounts;
@@ -55,18 +55,17 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
     address _esToken,
     address _pairToken,
     address _claimableToken,
-    address _rewardTracker
+    address _rewardTracker,
+    bool _needCheckStake
   ) {
     name = _name;
     symbol = _symbol;
-
     vestingDuration = _vestingDuration;
-
     esToken = _esToken;
     pairToken = _pairToken;
     claimableToken = _claimableToken;
-
     rewardTracker = _rewardTracker;
+    needCheckStake = _needCheckStake;
   }
 
   function setHandler(address _handler, bool _isActive) external onlyGov {
@@ -122,6 +121,10 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
     emit Withdraw(account, claimedAmount, balance);
   }
 
+  function setRewardTracker(address _rewardTracker) external onlyGov {
+    rewardTracker = _rewardTracker;
+  }
+
   function setCumulativeRewardDeductions(address _account, uint256 _amount) external override nonReentrant {
     _validateHandler();
     cumulativeRewardDeductions[_account] = _amount;
@@ -267,7 +270,6 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
    */
   function _deposit(address _account, uint256 _amount) private {
     require(_amount > 0, "Vester: invalid _amount");
-
     _updateVesting(_account);
 
     IERC20(esToken).safeTransferFrom(_account, address(this), _amount);
@@ -283,7 +285,11 @@ contract Vester is IVester, IERC20, ReentrancyGuard, Governable {
         _mintPair(_account, pairAmountDiff);
       }
     }
-
+    if (needCheckStake && hasRewardTracker()) {
+      // if u want to transfer 100 esCec to cec, u need to have 100 cec in stake
+      uint256 cecAmount = IRewardTracker(rewardTracker).depositBalances(_account, claimableToken);
+      require(balances[_account] <= cecAmount, "Vester: insufficient cec balance");
+    }
     uint256 maxAmount = getMaxVestableAmount(_account);
     require(getTotalVested(_account) <= maxAmount, "Vester: max vestable amount exceeded");
 
diff --git a/test/testStaking.ts b/test/testStaking.ts
index 5e26e29..8766598 100644
--- a/test/testStaking.ts
+++ b/test/testStaking.ts
@@ -59,6 +59,7 @@ describe('RewardRouter', function() {
       ZeroAddress,
       cec.target,
       ZeroAddress,
+      false
     );
 
     await stakedCecTracker.setInPrivateTransferMode(true)
diff --git a/test/testVester.ts b/test/testVester.ts
index 8d488c3..210eefc 100644
--- a/test/testVester.ts
+++ b/test/testVester.ts
@@ -29,6 +29,7 @@ describe("Vester", function () {
       ZeroAddress,
       cec.target,
       ZeroAddress,
+      false
     );
     await cec.mint(owner.address, expandDecimals(100000, 18));
     await esCec.mint(owner.address, expandDecimals(100000, 18));