diff --git a/4.use-case/2.read-a-drivers-license.html b/4.use-case/2.read-a-drivers-license.html
index d7dc951d..d17f33b6 100644
--- a/4.use-case/2.read-a-drivers-license.html
+++ b/4.use-case/2.read-a-drivers-license.html
@@ -6,6 +6,7 @@
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <meta name="description" content="Read the PDF417 barcode on Driver's Licenses instantly with this barcode reader.">
     <meta name="keywords" content="read driver's license barcode">
+    <link rel="canonical" href="https://demo.dynamsoft.com/samples/dbr/js/4.use-case/2.read-a-drivers-license.html">
     <title>Dynamsoft Barcode Reader Simple Sample - Read Driver License</title>
 </head>
 
@@ -659,4 +660,4 @@ <h1 id='header'>Read A Driver's License <a href="javascript:void(0)" id='readAga
     }
 </style>
 
-</html>
\ No newline at end of file
+</html>