diff --git a/contracts/utils/TimestampedHashRegistry.sol b/contracts/utils/TimestampedHashRegistry.sol
index d23da67..cbdbf5b 100644
--- a/contracts/utils/TimestampedHashRegistry.sol
+++ b/contracts/utils/TimestampedHashRegistry.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity 0.8.17;
+pragma solidity 0.8.18;
 
 // import "@api3/airnode-protocol-v1/contracts/utils/SelfMulticall.sol";
 import "../utils/SelfMulticall.sol"; // Uncomment line above and remove this line once this is moved to @api3/dapi-management
diff --git a/contracts/utils/interfaces/ITimestampedHashRegistry.sol b/contracts/utils/interfaces/ITimestampedHashRegistry.sol
index d7ef478..d05812a 100644
--- a/contracts/utils/interfaces/ITimestampedHashRegistry.sol
+++ b/contracts/utils/interfaces/ITimestampedHashRegistry.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity 0.8.17;
+pragma solidity 0.8.18;
 
 interface ITimestampedHashRegistry {
     event SetupSigners(bytes32 indexed hashType, address[] signers);