diff --git a/core/contracts/Litmus.sol b/core/contracts/Litmus.sol
index 42fb2bab7..1379f2628 100644
--- a/core/contracts/Litmus.sol
+++ b/core/contracts/Litmus.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-only
-pragma solidity ^0.8.9;
+pragma solidity ^0.8.21;
 
 // Uncomment this line to use console.log
 // import "hardhat/console.sol";
diff --git a/core/hardhat.config.ts b/core/hardhat.config.ts
index 687d555c4..64e14bce6 100644
--- a/core/hardhat.config.ts
+++ b/core/hardhat.config.ts
@@ -7,7 +7,7 @@ const config: HardhatUserConfig = {
   solidity: {
     compilers: [
       {
-        version: "0.8.17",
+        version: "0.8.21",
         settings: {
           optimizer: {
             enabled: true,