diff --git a/sample/index.html b/sample/index.html
index 40e6638..0e78cb2 100644
--- a/sample/index.html
+++ b/sample/index.html
@@ -57,6 +57,7 @@
     display: none;
   }
   </style>
+  <meta charset="UTF-8">
 </head>
 <body>
   <h1>
@@ -80,7 +81,7 @@
     </p>
     <p>
       <button onclick="setIcon()">Set Icon</button>
-      <button onclick="quark.setLabel('03:14 AM')">Set Label</button>
+      <button onclick="quark.setLabel('03:14 AM 喵')">Set Label</button>
       <button id="show-menu">Show Menu</button>
     </p>
     <p>
