diff --git a/tests/test-signature-string.html b/tests/test-signature-string.html
index 025d065..0d0cab6 100644
--- a/tests/test-signature-string.html
+++ b/tests/test-signature-string.html
@@ -9,7 +9,7 @@
 <head>
 	<title>NDN Signature - String</title>
 
-    <script type="text/javascript" src="../Helper.js"></script>
+    <script type="text/javascript" src="../build/ndn-js.js"></script>
 		
 	<script type="text/javascript">
 		function sign(){