diff --git a/contracts/core/dependency/AxieManager.sol b/contracts/core/dependency/AxieManager.sol
index dfbe63a..c10ef83 100644
--- a/contracts/core/dependency/AxieManager.sol
+++ b/contracts/core/dependency/AxieManager.sol
@@ -2,7 +2,7 @@ pragma solidity ^0.4.19;
 
 
 interface AxieSpawningManager {
-	function isSpawningAllowed(uint256 _genes, address _owner) external returns (bool);
+  function isSpawningAllowed(uint256 _genes, address _owner) external returns (bool);
   function isRebirthAllowed(uint256 _axieId, uint256 _genes) external returns (bool);
 }