diff --git a/capybara.gemspec b/capybara.gemspec
index 7feded8f..a2ea60d8 100644
--- a/capybara.gemspec
+++ b/capybara.gemspec
@@ -33,6 +33,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('regexp_parser', ['~>1.2'])
   s.add_runtime_dependency('xpath', ['~>3.2'])
 
+  s.add_development_dependency('byebug') unless RUBY_PLATFORM == 'java'
   s.add_development_dependency('cucumber', ['>= 2.3.0'])
   s.add_development_dependency('erubi') # dependency specification needed by rbx
   s.add_development_dependency('fuubar', ['>= 1.0.0'])
@@ -41,6 +42,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency('puma')
   s.add_development_dependency('rake')
   s.add_development_dependency('rspec', ['>= 3.4.0'])
+  s.add_development_dependency('rubocop')
+  s.add_development_dependency('rubocop-rspec')
   s.add_development_dependency('selenium-webdriver', ['~>3.5'])
   s.add_development_dependency('sinatra', ['>= 1.4.0'])
   s.add_development_dependency('webdrivers') if ENV['CI']