diff --git a/app/controllers/api/releases_controller.rb b/app/controllers/api/releases_controller.rb
index 0bff7bb..4c29ba9 100644
--- a/app/controllers/api/releases_controller.rb
+++ b/app/controllers/api/releases_controller.rb
@@ -45,13 +45,14 @@ class Api::ReleasesController < Api::ApiController
     if model_name == "acquired_media_release"
       mapping = {
         "#{model_name.camelize}": SerializableAcquiredMediaRelease,
-        FileInfo: SerializableFileInfo
+        FileInfo: SerializableFileInfo,
+        "ActiveStorage::Attachment".to_sym => ActiveStorage::SerializableAttachment,
       }
 
       render jsonapi: release,
            status: status,
            class: mapping,
-           include: [:file_infos]
+           include: [:files, :file_infos]
     else
       mapping = {
         "#{model_name.camelize}": show_serializable,
diff --git a/app/serializers/serializable_acquired_media_release.rb b/app/serializers/serializable_acquired_media_release.rb
index a05b181..6700b60 100644
--- a/app/serializers/serializable_acquired_media_release.rb
+++ b/app/serializers/serializable_acquired_media_release.rb
@@ -7,7 +7,7 @@ class SerializableAcquiredMediaRelease < JSONAPI::Serializable::Resource
               :person_title, :person_company, :created_at, :updated_at, :collection_uid, :territory_old, :term_old,
               :applicable_medium_id, :applicable_medium_text, :territory_id, :territory_text, :term_id, :term_text,
               :restriction_id, :restriction_text, :categories, :description, :tag_list
-  
+
   has_many :file_infos do
     data do
       @object.file_infos
@@ -17,4 +17,14 @@ class SerializableAcquiredMediaRelease < JSONAPI::Serializable::Resource
       { count: @object.file_infos.size }
     end
   end
+
+  has_many :files do
+    data do
+      @object.files
+    end
+
+    meta do
+      { count: @object.files.size }
+    end
+  end
 end
diff --git a/spec/controllers/api/acquired_media_releases_controller_spec.rb b/spec/controllers/api/acquired_media_releases_controller_spec.rb
index 6cceb57..e15effb 100644
--- a/spec/controllers/api/acquired_media_releases_controller_spec.rb
+++ b/spec/controllers/api/acquired_media_releases_controller_spec.rb
@@ -30,6 +30,16 @@ RSpec.describe Api::AcquiredMediaReleasesController, type: :controller do
 
       expect(response).to be_successful
     end
+
+    it 'contains files attachment data' do
+      tested_release = create(:acquired_media_release, name: 'ct1', project_id: project.id)
+
+      sign_in_to_api(current_user)
+      get :show, params: { id: tested_release.id }
+
+      expect(response.body).to match /file_infos/
+      expect(response.body).to match /files/
+    end
   end
 
   describe '#create' do