diff --git a/Gemfile.lock b/Gemfile.lock
index c2eda96b..bcdb6e12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -239,10 +239,6 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.31.3)
       parser (>= 3.3.1.0)
-    rubocop-capybara (2.21.0)
-      rubocop (~> 1.41)
-    rubocop-factory_bot (2.26.0)
-      rubocop (~> 1.41)
     rubocop-performance (1.21.1)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
@@ -251,13 +247,8 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rspec (2.31.0)
-      rubocop (~> 1.40)
-      rubocop-capybara (~> 2.17)
-      rubocop-factory_bot (~> 2.22)
-      rubocop-rspec_rails (~> 2.28)
-    rubocop-rspec_rails (2.29.0)
-      rubocop (~> 1.40)
+    rubocop-rspec (3.0.3)
+      rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
     rubyzip (2.3.2)
     sass-rails (6.0.0)
diff --git a/config/application.rb b/config/application.rb
index d1407928..e0e77836 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -22,12 +22,12 @@ class Application < Rails::Application
 
     config.load_defaults 7.0
 
-    config.mailer = YAML.load_file("#{Rails.root}/config/mailer.yml")[Rails.env]
+    config.mailer = YAML.load_file(Rails.root.join('config/mailer.yml').to_s)[Rails.env]
     config.autoload_paths += %W[#{config.root}/lib/utils]
     config.disable_animations = false
 
-    config.autoload_paths += %W[#{Rails.root}/app/presenters]
-    config.eager_load_paths += %W[#{Rails.root}/app/presenters]
+    config.autoload_paths += %W[#{Rails.root.join('app/presenters')}]
+    config.eager_load_paths += %W[#{Rails.root.join('app/presenters')}]
 
     # Enabling the behaviour where 'belongs_to' associations are required by default.
     # (https://guides.rubyonrails.org/upgrading_ruby_on_rails.html#active-record-belongs-to-required-by-default-option)