diff --git a/comments/views.py b/comments/views.py
index 4c5ce9c..c5bcf10 100644
--- a/comments/views.py
+++ b/comments/views.py
@@ -83,5 +83,8 @@ class CommentPostView(FormView):
             cache.delete('seo_processor')
         comment_cache_key = 'article_comments_{id}'.format(id=article_id)
         cache.delete(comment_cache_key)
-
+        from django.core.cache.utils import make_template_fragment_key
+        username = self.request.user.username if self.request.user  else ''
+        key = make_template_fragment_key('sidebar', [username])
+        cache.delete(key)
         return HttpResponseRedirect("%s#div-comment-%d" % (article.get_absolute_url(), comment.pk))
diff --git a/templates/blog/article_index.html b/templates/blog/article_index.html
index 2abebb9..83b6fdc 100644
--- a/templates/blog/article_index.html
+++ b/templates/blog/article_index.html
@@ -55,9 +55,7 @@
 
 
 {% block sidebar %}
-    {% cache 36000 sidebar request.user.username %}
-        {% load_sidebar request.user %}
-    {% endcache %}
+    {% load_sidebar user %}
 {% endblock %}