diff --git a/src/VotingPowerExchange.sol b/src/VotingPowerExchange.sol
index 8328f99..391b9e0 100644
--- a/src/VotingPowerExchange.sol
+++ b/src/VotingPowerExchange.sol
@@ -133,6 +133,9 @@ contract VotingPowerExchange is AccessControl, EIP712 {
             burningTokenAmount = calculateIncrementedBurningAmount(incrementedVotingPower, currentVotingPower);
         }
 
+        // msg.sender send utilityToken to the sender
+        // exchange role address need to approve this contract to transfer the utilityToken
+        utilityToken.transferFrom(msg.sender, sender, burningTokenAmount);
         // burn utilityToken from the `sender`
         utilityToken.burnByBurner(sender, burningTokenAmount);
 
diff --git a/test/fuzz/FuzzVotingPowerExchange.t.sol b/test/fuzz/FuzzVotingPowerExchange.t.sol
index cfa8546..f13f86d 100644
--- a/test/fuzz/FuzzVotingPowerExchange.t.sol
+++ b/test/fuzz/FuzzVotingPowerExchange.t.sol
@@ -64,6 +64,7 @@ contract VotingPwoerExchangeTest is Test {
         utilityToken.mint(user, 1_000 * 1e18);
         utilityToken.mint(participant, 100_000 * 1e18);
         utilityToken.mint(participant2, 10_000 * 1e18);
+        utilityToken.mint(exchanger, 10_000 * 1e18);
         vm.stopPrank();
 
         // set the voting power cap to 99e18