diff --git a/contracts/PoseidonHasher.sol b/contracts/PoseidonHasher.sol
index 91701c4..1f4ce4b 100644
--- a/contracts/PoseidonHasher.sol
+++ b/contracts/PoseidonHasher.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.7.4;
+pragma solidity 0.8.15;
 
 interface IPoseidonHasher {
 	function hash(uint256[2] memory input) external pure returns (uint256 result);
diff --git a/contracts/Rln.sol b/contracts/Rln.sol
index 1d9daf8..3246b8a 100644
--- a/contracts/Rln.sol
+++ b/contracts/Rln.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.7.4;
+pragma solidity 0.8.15;
 
 import { IPoseidonHasher } from "./PoseidonHasher.sol";