diff --git a/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol b/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
index 09ae033e33..3885a9929a 100644
--- a/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
+++ b/pkg/standalone-utils/contracts/relayer/BaseRelayerLibrary.sol
@@ -96,9 +96,9 @@ contract BaseRelayerLibrary is IBaseRelayerLibrary {
         }
     }
 
-    bytes32 private constant _TEMP_STORAGE_SUFFIX = keccak256("balancer.base-relayer-library");
+    bytes32 private immutable _TEMP_STORAGE_SUFFIX = keccak256("balancer.base-relayer-library");
 
-    function _getTempStorageSlot(uint256 ref) private pure returns (bytes32) {
+    function _getTempStorageSlot(uint256 ref) private view returns (bytes32) {
         // This replicates the mechanism Solidity uses to allocate storage slots for mappings, but using a hash as the
         // mapping's storage slot, and subtracting 1 at the end. This should be more enough to prevent collisions with
         // other state variables this or derived contracts might use.