diff --git a/index.html b/index.html
index e0c8466f..fd2eacea 100644
--- a/index.html
+++ b/index.html
@@ -1,3 +1,6 @@
+<!--img width attribute is omitted. So I added img width attribte.-->
+<!--img height attribute is omitted. So I added img height attribte.-->
+
 <!DOCTYPE html>
 <html lang="en">
 
@@ -8,8 +11,8 @@
   <meta name="description" content="Description">
   <meta name="viewport"
     content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <link rel="icon" type="image/png" href="images/favicon.png">
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsify-themeable@0/dist/css/theme-simple.css">
+  <link rel="icon" type="image/png" width="10" height="5" href="images/favicon.png">
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsify-themeable-@0/dist/css/themesimple.css">
 </head>
 
 <body>
