diff --git a/index.html b/index.html
index c8c8640..23d343d 100644
--- a/index.html
+++ b/index.html
@@ -2,6 +2,7 @@
 
 <head>
     <title>好棒 NiceBaseball by NiceChord+</title>
+    <meta charset="utf-8" />
     <link rel="stylesheet" href="style.css">
     <script src="p5.min.js"></script>
     <script src="p5.sound.min.js"></script>
