diff --git a/packages/contracts/src/systems/PveBotSystem.sol b/packages/contracts/src/systems/PveBotSystem.sol
index b3b073e..ead2d3d 100644
--- a/packages/contracts/src/systems/PveBotSystem.sol
+++ b/packages/contracts/src/systems/PveBotSystem.sol
@@ -19,7 +19,7 @@ contract PveBotSystem is System {
     function _getHeroIdx(address player) internal returns (bytes32 idx) {
         uint32 i = Player.getHeroOrderIdx(player);
 
-        idx = bytes32(uint256((uint160(player) << 32) + ++i));
+        idx = bytes32((uint256(uint160(player)) << 96) + ++i);
 
         Player.setHeroOrderIdx(player, i);
     }