diff --git a/layouts/partials/article.html b/layouts/partials/article.html
index f97af07..def6103 100644
--- a/layouts/partials/article.html
+++ b/layouts/partials/article.html
@@ -51,7 +51,7 @@
 
                     $window.on('scroll', onScroll);
                     $(document).ready(function() {
-                        $toc.find('a').parent('li').siblings('ul').hide();
+                        $toc.find('a').parent('li').find('ul').hide();
                         onScroll();
                         document.getElementsByClassName('article-toc')[0].style.display = '';
                     });
@@ -96,4 +96,4 @@
         {{ end }}
     </div>
     {{ partial "nav.html" . }}
-</article>
\ No newline at end of file
+</article>