Rakefile in solidus_sample-4.2.0 vs Rakefile in solidus_sample-4.2.1

@@ -2,9 +2,10 @@
 
 require 'rake'
 require 'rake/testtask'
 require 'rspec/core/rake_task'
 require 'spree/testing_support/dummy_app/rake_tasks'
+require 'bundler/gem_tasks'
 
 RSpec::Core::RakeTask.new
 task default: :spec
 
 DummyApp::RakeTasks.new(