diff --git a/.rubocop.yml b/.rubocop.yml
index 362d885..c9af4b1 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,7 @@ require:
   - rubocop-performance
 
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
 
 Naming/FileName:
   Exclude:
diff --git a/capistrano-rails-console.gemspec b/capistrano-rails-console.gemspec
index 4704ac7..d681fdf 100644
--- a/capistrano-rails-console.gemspec
+++ b/capistrano-rails-console.gemspec
@@ -25,4 +25,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rubocop'
+  spec.add_development_dependency 'rubocop-performance'
 end