diff --git a/docs/checkversion/index.html b/docs/checkversion/index.html
index 3ae45c42..f2a9ee1e 100644
--- a/docs/checkversion/index.html
+++ b/docs/checkversion/index.html
@@ -89,9 +89,9 @@ <h2>Introducing the application, manual, distribution</h2>
       <section id="main_content">
         <h1 id="checking-version">Checking Version</h1>
 
-<p>Current QuickViewer version is: <span id="current" >no version</span></p>
+<p>Current QuickViewer version is: <strong id="current" >no version</strong></p>
 
-<p>Your QuickViewer version is: <span id="version" >no version</span></p>
+<p>Your QuickViewer version is: <strong id="version" >no version</strong></p>
 
 <p>If you have an older version, please visit the QuickViewer <a href="https://github.com/kanryu/quickviewer/releases">Release page</a> if you want to update.</p>