diff --git a/index.html b/index.html
index 6f6b1a0..25c04e8 100644
--- a/index.html
+++ b/index.html
@@ -58,7 +58,7 @@
               <span style="margin-left:12px;"><input type="checkbox" id="theme-checkbox"><label for="theme-checkbox">Dark mode</label></span>
             </div>
         </div>
-        <div id="github"><a href="https://github.com/tanabe/markdown-live-preview"><img src="image/GitHub-Mark-Light-32px.webp"></a></div>
+        <div id="github"><a target="_blank" href="https://github.com/tanabe/markdown-live-preview"><img src="image/GitHub-Mark-Light-32px.webp"></a></div>
     </header>
 
     <div id="container" class="split-container">