diff --git a/contracts/common/interfaces.sol b/contracts/common/interfaces.sol
index d6138b1..d98519b 100644
--- a/contracts/common/interfaces.sol
+++ b/contracts/common/interfaces.sol
@@ -3,7 +3,7 @@ pragma experimental ABIEncoderV2;
 
 interface TokenInterface {
     function approve(address, uint256) external;
-    function transfer(address, uint) external;
+    function transfer(address, uint) external returns (bool);
     function transferFrom(address, address, uint) external;
     function deposit() external payable;
     function withdraw(uint) external;
diff --git a/contracts/liquidity.sol b/contracts/liquidity.sol
index 402b7fb..6422ce4 100644
--- a/contracts/liquidity.sol
+++ b/contracts/liquidity.sol
@@ -304,6 +304,8 @@ contract DydxFlashloaner is Setup, ICallee, DydxFlashloanBase, DSMath {
         Account.Info[] memory accountInfos = new Account.Info[](1);
         accountInfos[0] = _getAccountInfo();
 
+        wethContract.approve(soloAddr, ethAmt + 2);
+        
         solo.operate(accountInfos, operations);
     }
 }
diff --git a/contracts/senders/aave-v2-migrator/main.sol b/contracts/senders/aave-v2-migrator/main.sol
index 0c72688..25acd52 100644
--- a/contracts/senders/aave-v2-migrator/main.sol
+++ b/contracts/senders/aave-v2-migrator/main.sol
@@ -187,8 +187,8 @@ contract MigrateResolver is LiquidityResolver {
         _migrate(aave, _data, dsa);
         console.log("here3");
         aave.withdraw(wethAddr, ethAmt, address(this));
-        console.log("here4");
-        wethContract.transfer(address(flashloanContract), ethAmt);
+        console.log("here4", ethAmt);
+        require(wethContract.transfer(address(flashloanContract), ethAmt), "migrateFlashCallback: weth transfer failed to Instapool");
         console.log("here5");
     }