diff --git a/layout/comment/valine.ejs b/layout/comment/valine.ejs
index 657b335..8aee88d 100644
--- a/layout/comment/valine.ejs
+++ b/layout/comment/valine.ejs
@@ -3,7 +3,7 @@
     You forgot to set the <code>app_id</code> or <code>app_key</code> for Valine. Please set it in <code>_config.yml</code>.
 </div>
 <% } else { %>
-<div id="valine-thread"></div>
+<div id="valine-thread" class="content"></div>
 <script src="//cdn1.lncld.net/static/js/3.0.4/av-min.js"></script>
 <script src='//unpkg.com/valine/dist/Valine.min.js'></script>
 <script>