diff --git a/on-ruby-linter.gemspec b/on-ruby-linter.gemspec
index a516a43..133b30a 100644
--- a/on-ruby-linter.gemspec
+++ b/on-ruby-linter.gemspec
@@ -24,4 +24,8 @@ Gem::Specification.new do |spec|
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
+
+  spec.add_dependency 'rubocop', '~> 1.11'
+  spec.add_dependency 'rubocop-performance', '~> 1.10'
+  spec.add_dependency 'rubocop-rails', '~> 2.9'
 end