diff --git a/app/assets/config/manifest.js b/app/assets/config/manifest.js
index 751a5115..3beacac7 100644
--- a/app/assets/config/manifest.js
+++ b/app/assets/config/manifest.js
@@ -2,3 +2,4 @@
 //= link_tree ../pdfs
 //= link_directory ../stylesheets .css
 //= link_tree ../builds
+//= link application.css
diff --git a/app/models/concerns/acts_as_category.rb b/app/models/concerns/acts_as_category.rb
index c163928c..d10af112 100644
--- a/app/models/concerns/acts_as_category.rb
+++ b/app/models/concerns/acts_as_category.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require "translate"
-require "smart_pooler"
 
 module ActsAsCategory
   extend ActiveSupport::Concern
diff --git a/config/application.rb b/config/application.rb
index 4b19fb8b..1dbb2eeb 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -23,7 +23,7 @@
 module Kasaharacup
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 7.0
+    config.load_defaults 8.0
 
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 97b4446e..c8ce54a2 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -45,10 +45,10 @@
   config.active_support.deprecation = :stderr
 
   # Raises error for missing translations.
-  # config.i18n.raise_on_missing_translations = true
+  config.i18n.raise_on_missing_translations = true
 
   # Annotate rendered view with file names.
-  # config.action_view.annotate_rendered_view_with_filenames = true
+  config.action_view.annotate_rendered_view_with_filenames = true
 
   # Raise error when a before_action's only/except options reference missing actions.
   config.action_controller.raise_on_missing_callback_actions = true
diff --git a/config/initializers/new_framework_defaults_8_0.rb b/config/initializers/new_framework_defaults_8_0.rb
deleted file mode 100644
index 2dccb0da..00000000
--- a/config/initializers/new_framework_defaults_8_0.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-# frozen_string_literal: true
-
-# Be sure to restart your server when you modify this file.
-#
-# This file eases your Rails 8.0 framework defaults upgrade.
-#
-# Uncomment each configuration one by one to switch to the new default.
-# Once your application is ready to run with all new defaults, you can remove
-# this file and set the `config.load_defaults` to `8.0`.
-#
-# Read the Guide for Upgrading Ruby on Rails for more info on each option.
-# https://guides.rubyonrails.org/upgrading_ruby_on_rails.html
-
-###
-# Specifies whether `to_time` methods preserve the UTC offset of their receivers or preserves the timezone.
-# If set to `:zone`, `to_time` methods will use the timezone of their receivers.
-# If set to `:offset`, `to_time` methods will use the UTC offset.
-# If `false`, `to_time` methods will convert to the local system UTC offset instead.
-#++
-# Rails.application.config.active_support.to_time_preserves_timezone = :zone
-
-###
-# When both `If-Modified-Since` and `If-None-Match` are provided by the client
-# only consider `If-None-Match` as specified by RFC 7232 Section 6.
-# If set to `false` both conditions need to be satisfied.
-#++
-# Rails.application.config.action_dispatch.strict_freshness = true
-
-###
-# Set `Regexp.timeout` to `1`s by default to improve security over Regexp Denial-of-Service attacks.
-#++
-# Regexp.timeout = 1