diff --git a/app/models/admin_notification.rb b/app/models/admin_notification.rb
index 6fc3e83e3..5e86f3d28 100644
--- a/app/models/admin_notification.rb
+++ b/app/models/admin_notification.rb
@@ -1,4 +1,4 @@
-class AdminNotification < ActiveRecord::Base
+class AdminNotification < ApplicationRecord
   include Notifiable
 
   translates :title, touch: true
diff --git a/app/models/budget/phase.rb b/app/models/budget/phase.rb
index 2c50c10e8..5912a1453 100644
--- a/app/models/budget/phase.rb
+++ b/app/models/budget/phase.rb
@@ -1,5 +1,5 @@
 class Budget
-  class Phase < ActiveRecord::Base
+  class Phase < ApplicationRecord
     PHASE_KINDS = %w(drafting informing accepting reviewing selecting valuating publishing_prices balloting
                 reviewing_ballots finished).freeze
     PUBLISHED_PRICES_PHASES = %w(publishing_prices balloting reviewing_ballots finished).freeze
diff --git a/app/models/budget/valuator_group_assignment.rb b/app/models/budget/valuator_group_assignment.rb
index 88a04ae1a..3aa93cb14 100644
--- a/app/models/budget/valuator_group_assignment.rb
+++ b/app/models/budget/valuator_group_assignment.rb
@@ -1,5 +1,5 @@
 class Budget
-  class ValuatorGroupAssignment < ActiveRecord::Base
+  class ValuatorGroupAssignment < ApplicationRecord
     belongs_to :valuator_group, counter_cache: :budget_investments_count
     belongs_to :investment, counter_cache: true
   end
diff --git a/app/models/community.rb b/app/models/community.rb
index c9dd0ddfb..b41dd45fc 100644
--- a/app/models/community.rb
+++ b/app/models/community.rb
@@ -1,4 +1,4 @@
-class Community < ActiveRecord::Base
+class Community < ApplicationRecord
   has_one :proposal
   has_one :investment, class_name: Budget::Investment
   has_many :topics
diff --git a/app/models/document.rb b/app/models/document.rb
index e8524bc72..e1dd94ceb 100644
--- a/app/models/document.rb
+++ b/app/models/document.rb
@@ -1,4 +1,4 @@
-class Document < ActiveRecord::Base
+class Document < ApplicationRecord
   include DocumentsHelper
   include DocumentablesHelper
   has_attached_file :attachment, url: "/system/:class/:prefix/:style/:hash.:extension",
diff --git a/app/models/follow.rb b/app/models/follow.rb
index 51628f7d4..8062ffecc 100644
--- a/app/models/follow.rb
+++ b/app/models/follow.rb
@@ -1,4 +1,4 @@
-class Follow < ActiveRecord::Base
+class Follow < ApplicationRecord
   belongs_to :user
   belongs_to :followable, polymorphic: true
 
diff --git a/app/models/image.rb b/app/models/image.rb
index a782d1916..ce8e750ef 100644
--- a/app/models/image.rb
+++ b/app/models/image.rb
@@ -1,4 +1,4 @@
-class Image < ActiveRecord::Base
+class Image < ApplicationRecord
   include ImagesHelper
   include ImageablesHelper
 
diff --git a/app/models/legislation/proposal.rb b/app/models/legislation/proposal.rb
index 0e1a39c90..16ab2d7dd 100644
--- a/app/models/legislation/proposal.rb
+++ b/app/models/legislation/proposal.rb
@@ -1,4 +1,4 @@
-class Legislation::Proposal < ActiveRecord::Base
+class Legislation::Proposal < ApplicationRecord
   include ActsAsParanoidAliases
   include Flaggable
   include Taggable
diff --git a/app/models/local_census_record.rb b/app/models/local_census_record.rb
index 1c2c42d44..d275ec130 100644
--- a/app/models/local_census_record.rb
+++ b/app/models/local_census_record.rb
@@ -1,4 +1,4 @@
-class LocalCensusRecord < ActiveRecord::Base
+class LocalCensusRecord < ApplicationRecord
   validates :document_number, presence: true
   validates :document_type, presence: true
   validates :date_of_birth, presence: true
diff --git a/app/models/map_location.rb b/app/models/map_location.rb
index 892ba8f20..d69c97ea3 100644
--- a/app/models/map_location.rb
+++ b/app/models/map_location.rb
@@ -1,4 +1,4 @@
-class MapLocation < ActiveRecord::Base
+class MapLocation < ApplicationRecord
 
   belongs_to :proposal, touch: true
   belongs_to :investment, class_name: Budget::Investment, touch: true
diff --git a/app/models/newsletter.rb b/app/models/newsletter.rb
index 35ed57b91..bac4d8ef7 100644
--- a/app/models/newsletter.rb
+++ b/app/models/newsletter.rb
@@ -1,4 +1,4 @@
-class Newsletter < ActiveRecord::Base
+class Newsletter < ApplicationRecord
   has_many :activities, as: :actionable
 
   validates :subject, presence: true
diff --git a/app/models/poll/question/answer.rb b/app/models/poll/question/answer.rb
index 2efa2b824..f3eb0c97e 100644
--- a/app/models/poll/question/answer.rb
+++ b/app/models/poll/question/answer.rb
@@ -1,4 +1,4 @@
-class Poll::Question::Answer < ActiveRecord::Base
+class Poll::Question::Answer < ApplicationRecord
   include Galleryable
   include Documentable
 
diff --git a/app/models/poll/question/answer/video.rb b/app/models/poll/question/answer/video.rb
index 4804f5188..f7b9e9676 100644
--- a/app/models/poll/question/answer/video.rb
+++ b/app/models/poll/question/answer/video.rb
@@ -1,4 +1,4 @@
-class Poll::Question::Answer::Video < ActiveRecord::Base
+class Poll::Question::Answer::Video < ApplicationRecord
   belongs_to :answer, class_name: "Poll::Question::Answer", foreign_key: "answer_id"
 
   VIMEO_REGEX = /vimeo.*(staffpicks\/|channels\/|videos\/|video\/|\/)([^#\&\?]*).*/
diff --git a/app/models/poll/shift.rb b/app/models/poll/shift.rb
index dd5c1db32..828fba66e 100644
--- a/app/models/poll/shift.rb
+++ b/app/models/poll/shift.rb
@@ -1,5 +1,5 @@
 class Poll
-  class Shift < ActiveRecord::Base
+  class Shift < ApplicationRecord
     belongs_to :booth
     belongs_to :officer
 
diff --git a/app/models/related_content.rb b/app/models/related_content.rb
index f9facb47a..4a74ba3c7 100644
--- a/app/models/related_content.rb
+++ b/app/models/related_content.rb
@@ -1,4 +1,4 @@
-class RelatedContent < ActiveRecord::Base
+class RelatedContent < ApplicationRecord
   RELATED_CONTENT_SCORE_THRESHOLD = Setting["related_content_score_threshold"].to_f
   RELATIONABLE_MODELS = %w{proposals debates budgets investments}.freeze
 
diff --git a/app/models/related_content_score.rb b/app/models/related_content_score.rb
index da37fc07d..3d7684545 100644
--- a/app/models/related_content_score.rb
+++ b/app/models/related_content_score.rb
@@ -1,4 +1,4 @@
-class RelatedContentScore < ActiveRecord::Base
+class RelatedContentScore < ApplicationRecord
   SCORES = {
     POSITIVE: 1,
     NEGATIVE: -1
diff --git a/app/models/topic.rb b/app/models/topic.rb
index e9e463aa5..8130c03da 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -1,4 +1,4 @@
-class Topic < ActiveRecord::Base
+class Topic < ApplicationRecord
   acts_as_paranoid column: :hidden_at
   include ActsAsParanoidAliases
   include Notifiable
diff --git a/app/models/valuator_group.rb b/app/models/valuator_group.rb
index 26738b542..9e8d388b5 100644
--- a/app/models/valuator_group.rb
+++ b/app/models/valuator_group.rb
@@ -1,4 +1,4 @@
-class ValuatorGroup < ActiveRecord::Base
+class ValuatorGroup < ApplicationRecord
   has_many :valuators
   has_many :valuator_group_assignments, dependent: :destroy, class_name: "Budget::ValuatorGroupAssignment"
   has_many :investments, through: :valuator_group_assignments, class_name: "Budget::Investment"