Gemfile in rubydora-1.9.1 vs Gemfile in rubydora-2.0.0

@@ -2,5 +2,6 @@
 
 gemspec
 
 gem 'jruby-openssl', :platform => :jruby
 gem 'activesupport', '< 5' if RUBY_VERSION < '2.2.2'
+gem 'rake', '< 12'