diff --git a/contracts/Campaign.sol b/contracts/Campaign.sol
index 41b890b..49fa893 100644
--- a/contracts/Campaign.sol
+++ b/contracts/Campaign.sol
@@ -117,7 +117,7 @@ contract Campaign is KeeperCompatibleInterface, ReentrancyGuard{
   }
 
   function donate(address _donator, bool _rewardable) public payable nonReentrant{
-    // if(msg.sender != i_crf){revert();}
+    if(msg.sender != i_crf){revert();}
     if(c_state != C_State.Fundraising){revert();}
     if(_donator == i_creator){revert();}
     currentBalance = currentBalance + msg.value;
@@ -164,7 +164,7 @@ contract Campaign is KeeperCompatibleInterface, ReentrancyGuard{
   }
 
   function refund(address _donator) external nonReentrant{
-    // if(msg.sender != i_crf){revert();}
+    if(msg.sender != i_crf){revert();}
     if(c_state == C_State.Expired){revert();}
     if(aggrDonations[_donator] == 0 ){revert();}
     uint256 amountToRefund = aggrDonations[_donator];
@@ -176,7 +176,7 @@ contract Campaign is KeeperCompatibleInterface, ReentrancyGuard{
     if(entDonations[_donator].length > 0){    
       for(uint i=0; i<entDonations[_donator].length; i++){
         if(!(rewards[entDonations[_donator][i]] != address(0))){
-          Reward(rewards[entDonations[_donator][i]] ).removeDonator(_donator);
+          Reward(rewards[entDonations[_donator][i]]).removeDonator(_donator);
         }
       }
     }