diff --git a/src/StdUtils.sol b/src/StdUtils.sol
index 0f613057..a1f3ccd2 100644
--- a/src/StdUtils.sol
+++ b/src/StdUtils.sol
@@ -18,10 +18,12 @@ abstract contract StdUtils {
     address private constant CONSOLE2_ADDRESS = 0x000000000000000000636F6e736F6c652e6c6f67;
     uint256 private constant INT256_MIN_ABS =
         57896044618658097711785492504343953926634992332820282019728792003956564819968;
+    uint40 internal constant MAX_UNIX_TIMESTAMP = 2_147_483_647; // 2^31 - 1
     uint256 private constant SECP256K1_ORDER =
         115792089237316195423570985008687907852837564279074904382605163141518161494337;
     uint256 private constant UINT256_MAX =
         115792089237316195423570985008687907853269984665640564039457584007913129639935;
+    uint40 internal constant UINT40_MAX = 1099511627775;
 
     // Used by default when deploying with create2, https://github.com/Arachnid/deterministic-deployment-proxy.
     address private constant CREATE2_FACTORY = 0x4e59b44847b379578588920cA78FbF26c0B4956C;