diff --git a/Gemfile b/Gemfile
index 06ef286f..2a10269f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,8 +2,8 @@ source 'https://rubygems.org'
 gemspec
 
 unless ENV['TRAVIS']
-  gem 'debugger',  require: false, platforms: :ruby if RUBY_VERSION == '2.0.0'
-  gem 'yard',      require: false
+  gem 'byebug', require: false, platforms: :ruby
+  gem 'yard',   require: false
 end
 
 gem 'simplecov', require: false