diff --git a/src/FnameResolver.sol b/src/FnameResolver.sol
index d9b6b039..d4dfac8b 100644
--- a/src/FnameResolver.sol
+++ b/src/FnameResolver.sol
@@ -89,7 +89,7 @@ contract FnameResolver is IExtendedResolver, EIP712, ERC165, Ownable2Step {
     //////////////////////////////////////////////////////////////*/
 
     /**
-     * @dev URL of the CCIP lookup gateway.
+     * @dev URL of the CCIP lookup gateway. Set once during deployment and cannot be changed.
      */
     string public url;