diff --git a/tutorial-04/testLibrary.sol b/tutorial-04/testLibrary.sol
index 96208d1..8efa5b4 100644
--- a/tutorial-04/testLibrary.sol
+++ b/tutorial-04/testLibrary.sol
@@ -1,6 +1,6 @@
-pragma solidity ^0.4.0;
+pragma solidity >=0.5.0 < 0.9.0 ;
 
-import "browser/library.sol";
+import "./library.sol";
 
 contract TestLibrary {
     using IntExtended for uint;