diff --git a/contracts/ethregistrar/IBaseRegistrar.sol b/contracts/ethregistrar/IBaseRegistrar.sol
index 5f43e9c1..1f0e1943 100644
--- a/contracts/ethregistrar/IBaseRegistrar.sol
+++ b/contracts/ethregistrar/IBaseRegistrar.sol
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ~0.8.17;
 import "../registry/ENS.sol";
 import "./IBaseRegistrar.sol";
 import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
diff --git a/contracts/reverseRegistrar/IReverseRegistrar.sol b/contracts/reverseRegistrar/IReverseRegistrar.sol
index 9b99dd53..845396b1 100644
--- a/contracts/reverseRegistrar/IReverseRegistrar.sol
+++ b/contracts/reverseRegistrar/IReverseRegistrar.sol
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 pragma solidity >=0.8.4;
 
 interface IReverseRegistrar {