diff --git a/contracts/contracts/levels/Shop.sol b/contracts/contracts/levels/Shop.sol
index 69e248ad9..546d1dc51 100644
--- a/contracts/contracts/levels/Shop.sol
+++ b/contracts/contracts/levels/Shop.sol
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
-interface Buyer {
+interface IBuyer {
   function price() external view returns (uint);
 }