diff --git a/app/models/invoice/data_presenter/base.rb b/app/models/invoice/data_presenter/base.rb
index 83ba80cad5..b27976fbe0 100644
--- a/app/models/invoice/data_presenter/base.rb
+++ b/app/models/invoice/data_presenter/base.rb
@@ -3,7 +3,7 @@
 class Invoice
   class DataPresenter
     class Base
-      attr :data
+      attr_reader :data
 
       def initialize(data)
         @data = data
diff --git a/app/services/invoice_data_generator.rb b/app/services/invoice_data_generator.rb
index a9bc14cab6..ee655e8d81 100644
--- a/app/services/invoice_data_generator.rb
+++ b/app/services/invoice_data_generator.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class InvoiceDataGenerator
-  attr :order
+  attr_reader :order
 
   def initialize(order)
     @order = order
diff --git a/app/services/order_invoice_comparator.rb b/app/services/order_invoice_comparator.rb
index fe2601d261..24c02fced8 100644
--- a/app/services/order_invoice_comparator.rb
+++ b/app/services/order_invoice_comparator.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class OrderInvoiceComparator
-  attr :order
+  attr_reader :order
 
   def initialize(order)
     @order = order