diff --git a/app/serializers/web_hook_post_serializer.rb b/app/serializers/web_hook_post_serializer.rb
index 5d79ef5f483..623e8ab9df6 100644
--- a/app/serializers/web_hook_post_serializer.rb
+++ b/app/serializers/web_hook_post_serializer.rb
@@ -1,4 +1,7 @@
 class WebHookPostSerializer < PostSerializer
+
+  attributes :topic_posts_count
+
   def include_topic_title?
     true
   end
@@ -14,4 +17,9 @@ class WebHookPostSerializer < PostSerializer
       false
     end
   end
+
+  def topic_posts_count
+    object.topic && object.topic.posts_count
+  end
+
 end