diff --git a/contracts/ProxyLogics/MCD/InstaCompMcdMigrate.sol b/contracts/ProxyLogics/MCD/InstaCompMcdMigrate.sol
index bb9705d..dc19ce3 100644
--- a/contracts/ProxyLogics/MCD/InstaCompMcdMigrate.sol
+++ b/contracts/ProxyLogics/MCD/InstaCompMcdMigrate.sol
@@ -91,23 +91,28 @@ interface OtcInterface {
     ) external;
 }
 
-contract ManagerLike {
-    function cdpCan(address, uint, address) public view returns (uint);
-    function ilks(uint) public view returns (bytes32);
-    function owns(uint) public view returns (address);
-    function urns(uint) public view returns (address);
-    function vat() public view returns (address);
-    function open(bytes32, address) public returns (uint);
-    function give(uint, address) public;
-    function cdpAllow(uint, address, uint) public;
-    function urnAllow(address, uint) public;
-    function frob(uint, int, int) public;
-    function flux(uint, address, uint) public;
-    function move(uint, address, uint) public;
-    function exit(address, uint, address, uint) public;
-    function quit(uint, address) public;
-    function enter(address, uint) public;
-    function shift(uint, uint) public;
+interface ManagerLike {
+    function cdpCan(address, uint, address) external view returns (uint);
+    function ilks(uint) external view returns (bytes32);
+    function owns(uint) external view returns (address);
+    function urns(uint) external view returns (address);
+    function vat() external view returns (address);
+    function open(bytes32, address) external returns (uint);
+    function give(uint, address) external;
+    function cdpAllow(uint, address, uint) external;
+    function urnAllow(address, uint) external;
+    function frob(uint, int, int) external;
+    function flux(uint, address, uint) external;
+    function move(uint, address, uint) external;
+    function exit(
+        address,
+        uint,
+        address,
+        uint
+    ) external;
+    function quit(uint, address) external;
+    function enter(address, uint) external;
+    function shift(uint, uint) external;
 }
 
 interface GemLike {