diff --git a/src/irmodels/AuctionRateModel.sol b/src/irmodels/AuctionRateModel.sol
index 65c4aa3..c46eca8 100644
--- a/src/irmodels/AuctionRateModel.sol
+++ b/src/irmodels/AuctionRateModel.sol
@@ -9,7 +9,7 @@ import { BaseRiskModel } from "../services/BaseRiskModel.sol";
 /// Rate model in which baseIR is based on a Dutch auction
 /// 1e18 corresponds to 1, i.e. an interest rate of 100%
 abstract contract AuctionRateModel is Ownable, BaseRiskModel {
-    uint256 constant MAX_RATE = 1e18;
+    uint256 private constant MAX_RATE = 1e18;
     /**
      * @dev gas saving trick
      * latest is a timestamp and base < 1e18, they all fit in uint256
diff --git a/src/services/debit/GmxService.sol b/src/services/debit/GmxService.sol
index 0f2374f..b2b5fde 100644
--- a/src/services/debit/GmxService.sol
+++ b/src/services/debit/GmxService.sol
@@ -19,7 +19,7 @@ import { Service } from "../Service.sol";
 contract GmxService is AuctionRateModel, DebitService {
     using SafeERC20 for IERC20;
 
-    uint256 constant BASIS_POINTS_DIVISOR = 10000;
+    uint256 private constant BASIS_POINTS_DIVISOR = 10000;
 
     IRewardRouter public immutable router;
     IRewardRouterV2 public immutable routerV2;