diff --git a/app/models/comment.rb b/app/models/comment.rb
index efa9ec7a0..233736824 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -2,7 +2,7 @@ class Comment < ActiveRecord::Base
   acts_as_paranoid column: :hidden_at
   include ActsAsParanoidAliases
   acts_as_votable
-  has_ancestry
+  has_ancestry touch: true
 
   attr_accessor :as_moderator, :as_administrator