diff --git a/app/controllers/user_versions_controller.rb b/app/controllers/user_versions_controller.rb
index ad3ba0809..cf6c4a8e4 100644
--- a/app/controllers/user_versions_controller.rb
+++ b/app/controllers/user_versions_controller.rb
@@ -5,7 +5,7 @@ class UserVersionsController < ApplicationController
   def index
     repository_object = RepositoryObject.find_by!(external_identifier: params[:object_id])
 
-    render json: { user_versions: user_versions_content(repository_object.user_versions) }
+    render json: { user_versions: repository_object.user_versions.map(&:as_json) }
   end
 
   def show
@@ -15,15 +15,4 @@ def show
   rescue RepositoryObjectVersion::NoCocina
     json_api_error(status: :not_found, message: 'No Cocina for specified version')
   end
-
-  private
-
-  def user_versions_content(user_versions)
-    user_versions.map do |user_version|
-      {
-        userVersion: user_version.version,
-        version: user_version.repository_object_version.version
-      }
-    end
-  end
 end
diff --git a/app/models/user_version.rb b/app/models/user_version.rb
index 0c0156065..098bd7c43 100644
--- a/app/models/user_version.rb
+++ b/app/models/user_version.rb
@@ -10,4 +10,12 @@ def repository_object_version_is_closed
     # Validate that the repository object version is closed
     errors.add(:repository_object_version, 'cannot set a user version to an open RepositoryObjectVersion') if repository_object_version.open?
   end
+
+  def as_json
+    {
+      userVersion: version,
+      version: repository_object_version.version,
+      withdrawn:
+    }
+  end
 end
diff --git a/spec/requests/user_versions_inventory_spec.rb b/spec/requests/user_versions_inventory_spec.rb
index 5b4974078..62a025e9c 100644
--- a/spec/requests/user_versions_inventory_spec.rb
+++ b/spec/requests/user_versions_inventory_spec.rb
@@ -18,8 +18,10 @@
           headers: { 'Authorization' => "Bearer #{jwt}" }
 
       expect(response).to have_http_status(:ok)
-      expect(response.body).to eq '{"user_versions":[{"userVersion":1,"version":1},' \
-                                  '{"userVersion":2,"version":2}]}'
+      expect(response.parsed_body).to eq('user_versions' => [
+                                           { 'userVersion' => 1, 'version' => 1, 'withdrawn' => false },
+                                           { 'userVersion' => 2, 'version' => 2, 'withdrawn' => false }
+                                         ])
     end
   end
 end