diff --git a/app/models/application_record.rb b/app/models/application_record.rb
new file mode 100644
index 0000000..10a4cba
--- /dev/null
+++ b/app/models/application_record.rb
@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end
diff --git a/app/models/article.rb b/app/models/article.rb
index a7afbf0..f01b9c3 100644
--- a/app/models/article.rb
+++ b/app/models/article.rb
@@ -22,7 +22,7 @@
 #  category       :string(255)
 #
 
-class Article < ActiveRecord::Base
+class Article < ApplicationRecord
   belongs_to :supplier
   
   validates_numericality_of :price, :tax, :deposit, :unit_quantity
diff --git a/app/models/supplier.rb b/app/models/supplier.rb
index aa93a85..b5a7635 100644
--- a/app/models/supplier.rb
+++ b/app/models/supplier.rb
@@ -1,4 +1,4 @@
-class Supplier < ActiveRecord::Base
+class Supplier < ApplicationRecord
   has_many :articles, :dependent => :destroy
   has_many :user_accesses, :dependent => :destroy
   has_many :users, :through => :user_accesses
diff --git a/app/models/user.rb b/app/models/user.rb
index 4d68509..211764d 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,4 +1,4 @@
-class User < ActiveRecord::Base
+class User < ApplicationRecord
 
   has_many :user_accesses, :dependent => :destroy
   has_many :suppliers, :through => :user_accesses
diff --git a/app/models/user_access.rb b/app/models/user_access.rb
index b43e247..e2853ab 100644
--- a/app/models/user_access.rb
+++ b/app/models/user_access.rb
@@ -1,4 +1,4 @@
-class UserAccess < ActiveRecord::Base
+class UserAccess < ApplicationRecord
   belongs_to :user
   belongs_to :supplier
 end