diff --git a/app/models/active_poll.rb b/app/models/active_poll.rb
index 50e185ea5..040a33451 100644
--- a/app/models/active_poll.rb
+++ b/app/models/active_poll.rb
@@ -1,4 +1,4 @@
-class ActivePoll < ActiveRecord::Base
+class ActivePoll < ApplicationRecord
   include Measurable
 
   translates :description, touch: true
diff --git a/app/models/budget/content_block.rb b/app/models/budget/content_block.rb
index bba830cec..ae3bf44e9 100644
--- a/app/models/budget/content_block.rb
+++ b/app/models/budget/content_block.rb
@@ -1,5 +1,5 @@
 class Budget
-  class ContentBlock < ActiveRecord::Base
+  class ContentBlock < ApplicationRecord
     validates :locale, presence: true, inclusion: { in: I18n.available_locales.map(&:to_s) }
     validates :heading, presence: true
     validates_uniqueness_of :heading, scope: :locale
diff --git a/app/models/ckeditor/asset.rb b/app/models/ckeditor/asset.rb
index cf636ed19..5c166fdfc 100644
--- a/app/models/ckeditor/asset.rb
+++ b/app/models/ckeditor/asset.rb
@@ -1,4 +1,4 @@
-class Ckeditor::Asset < ActiveRecord::Base
+class Ckeditor::Asset < ApplicationRecord
   include Ckeditor::Orm::ActiveRecord::AssetBase
   include Ckeditor::Backend::Paperclip
 end
diff --git a/app/models/milestone.rb b/app/models/milestone.rb
index 124e05870..69d46149a 100644
--- a/app/models/milestone.rb
+++ b/app/models/milestone.rb
@@ -1,4 +1,4 @@
-class Milestone < ActiveRecord::Base
+class Milestone < ApplicationRecord
   include Imageable
   include Documentable
   documentable max_documents_allowed: 3,
diff --git a/app/models/milestone/status.rb b/app/models/milestone/status.rb
index 51b03427d..5f99cac22 100644
--- a/app/models/milestone/status.rb
+++ b/app/models/milestone/status.rb
@@ -1,4 +1,4 @@
-class Milestone::Status < ActiveRecord::Base
+class Milestone::Status < ApplicationRecord
   acts_as_paranoid column: :hidden_at
 
   has_many :milestones
diff --git a/app/models/progress_bar.rb b/app/models/progress_bar.rb
index e739e4243..c0bacc7ba 100644
--- a/app/models/progress_bar.rb
+++ b/app/models/progress_bar.rb
@@ -1,4 +1,4 @@
-class ProgressBar < ActiveRecord::Base
+class ProgressBar < ApplicationRecord
   self.inheritance_column = nil
   RANGE = 0..100