diff --git a/contract/SimpleNft.sol b/contract/SimpleNft.sol
index 7977bfc..13bbee3 100644
--- a/contract/SimpleNft.sol
+++ b/contract/SimpleNft.sol
@@ -13,7 +13,7 @@
     to the best of the developers' knowledge to work as intended.
 */
 
-pragma solidity >=0.7.0 <0.9.0;
+pragma solidity >=0.8.0 <0.9.0;
 
 import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
 import "@openzeppelin/contracts/access/Ownable.sol";
diff --git a/contract/SimpleNftLowerGas.sol b/contract/SimpleNftLowerGas.sol
index 163e0f2..a910b6c 100644
--- a/contract/SimpleNftLowerGas.sol
+++ b/contract/SimpleNftLowerGas.sol
@@ -15,7 +15,7 @@
     using the code for your own project.
 */
 
-pragma solidity >=0.7.0 <0.9.0;
+pragma solidity >=0.8.0 <0.9.0;
 
 import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
 import "@openzeppelin/contracts/utils/Counters.sol";