diff --git a/.rubocop.yml b/.rubocop.yml
index 0cb4f8ca..07b0876d 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,3 +1,4 @@
+require: rubocop-performance
 AllCops:
   TargetRubyVersion: 2.4
   Exclude:
diff --git a/wpscan.gemspec b/wpscan.gemspec
index ded908c9..c9d9bf01 100644
--- a/wpscan.gemspec
+++ b/wpscan.gemspec
@@ -23,14 +23,15 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'cms_scanner', '~> 0.5.0'
 
-  s.add_development_dependency 'bundler',   '>= 1.6'
-  s.add_development_dependency 'coveralls', '~> 0.8.0'
-  s.add_development_dependency 'memory_profiler', '~> 0.9.13'
-  s.add_development_dependency 'rake', '~> 12.3'
-  s.add_development_dependency 'rspec', '~> 3.8.0'
-  s.add_development_dependency 'rspec-its', '~> 1.3.0'
-  s.add_development_dependency 'rubocop', '~> 0.67.2'
-  s.add_development_dependency 'simplecov', '~> 0.16.1'
-  s.add_development_dependency 'stackprof', '~> 0.2.12'
-  s.add_development_dependency 'webmock', '~> 3.5.1'
+  s.add_development_dependency 'bundler',             '>= 1.6'
+  s.add_development_dependency 'coveralls',           '~> 0.8.0'
+  s.add_development_dependency 'memory_profiler',     '~> 0.9.13'
+  s.add_development_dependency 'rake',                '~> 12.3'
+  s.add_development_dependency 'rspec',               '~> 3.8.0'
+  s.add_development_dependency 'rspec-its',           '~> 1.3.0'
+  s.add_development_dependency 'rubocop',             '~> 0.68.0'
+  s.add_development_dependency 'rubocop-performance', '~> 1.1.0'
+  s.add_development_dependency 'simplecov',           '~> 0.16.1'
+  s.add_development_dependency 'stackprof',           '~> 0.2.12'
+  s.add_development_dependency 'webmock',             '~> 3.5.1'
 end