diff --git a/contracts/aave/FlashLoanReceiverBase.sol b/contracts/aave/FlashLoanReceiverBase.sol
index 154fa69..676c5b6 100644
--- a/contracts/aave/FlashLoanReceiverBase.sol
+++ b/contracts/aave/FlashLoanReceiverBase.sol
@@ -1,8 +1,8 @@
 pragma solidity ^0.6.6;
 
-import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol";
-import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";
-import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol";
+import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/solc-0.6/contracts/math/SafeMath.sol";
+import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/solc-0.6/contracts/token/ERC20/IERC20.sol";
+import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/solc-0.6/contracts/token/ERC20/SafeERC20.sol";
 import "./IFlashLoanReceiver.sol";
 import "./ILendingPoolAddressesProvider.sol";
 import "../utils/Withdrawable.sol";