diff --git a/hardhat.config.ts b/hardhat.config.ts
index 314e626..314e806 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -40,7 +40,7 @@ const config: HardhatUserConfig = {
   solidity: {
     compilers: [
       {
-        version: '0.8.7',
+        version: '0.8.16',
         settings: {
           optimizer: {
             enabled: true,
diff --git a/solidity/contracts/Greeter.sol b/solidity/contracts/Greeter.sol
index 13638d5..b280c1d 100644
--- a/solidity/contracts/Greeter.sol
+++ b/solidity/contracts/Greeter.sol
@@ -1,5 +1,5 @@
 //SPDX-License-Identifier: Unlicense
-pragma solidity 0.8.7;
+pragma solidity 0.8.16;
 
 import 'hardhat/console.sol';
 import '../interfaces/IGreeter.sol';
diff --git a/solidity/interfaces/IGreeter.sol b/solidity/interfaces/IGreeter.sol
index d71f247..ed566f1 100644
--- a/solidity/interfaces/IGreeter.sol
+++ b/solidity/interfaces/IGreeter.sol
@@ -1,5 +1,5 @@
 //SPDX-License-Identifier: Unlicense
-pragma solidity 0.8.7;
+pragma solidity 0.8.16;
 
 interface IGreeter {
   event GreetingSet(string _greeting);