diff --git a/samples/calc-02/index.html b/samples/calc-02/index.html
index 28cd242..39b30ce 100644
--- a/samples/calc-02/index.html
+++ b/samples/calc-02/index.html
@@ -4,7 +4,7 @@
 	<meta charset="utf-8">
 	<meta name="viewport" content="width=device-width, initial-scale=1">
 	<title>HP48GX RPN Calculator</title>
-	<link rel="stylesheet" href="./index.css">
+	<link rel="stylesheet" href="./index.css?ver=1">
 </head>
 <body>
 	<main class="app-shell">
