diff --git a/backend/app/controllers/posts_controller.rb b/backend/app/controllers/posts_controller.rb
index 73f3995..ab451d5 100644
--- a/backend/app/controllers/posts_controller.rb
+++ b/backend/app/controllers/posts_controller.rb
@@ -71,7 +71,7 @@ class PostsController < ApplicationController
     post.thumbnail.attach(thumbnail)
     if post.save
       post.resized_thumbnail!
-      post.tags = Tag.normalise_tags(tags_names)
+      post.tags = Tag.normalise_tags(tag_names)
       render json: post.as_json(include: { tags: { only: [:id, :name, :category, :post_count] } }),
              status: :created
     else
diff --git a/backend/config/schedule.rb b/backend/config/schedule.rb
index 7ba2687..b4db72a 100644
--- a/backend/config/schedule.rb
+++ b/backend/config/schedule.rb
@@ -6,3 +6,7 @@ set :output, standard: '/var/log/btrc_hub_nico_sync.log',
 every 1.day, at: '3:00 pm' do
   rake 'nico:sync', environment: 'production'
 end
+
+every 1.day, at: '0:00 am' do
+  rake 'post_similarity:calc', environment: 'production'
+end