diff --git a/colorls.gemspec b/colorls.gemspec
index d21af36d..f70098b2 100644
--- a/colorls.gemspec
+++ b/colorls.gemspec
@@ -77,7 +77,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rspec', '~> 3.7'
   spec.add_development_dependency 'rspec-its', '~> 1.2'
   spec.add_development_dependency 'rubocop', '~> 1.11.0'
-  spec.add_development_dependency 'rubocop-performance', '~> 1.9.0'
+  spec.add_development_dependency 'rubocop-performance', '~> 1.10.1'
   spec.add_development_dependency 'rubocop-rake', '~> 0.5'
   spec.add_development_dependency 'rubocop-rspec', '~> 2.0'
   spec.add_development_dependency 'rubygems-tasks', '~> 0'
diff --git a/lib/colorls/flags.rb b/lib/colorls/flags.rb
index 3ffed55d..09d6e988 100644
--- a/lib/colorls/flags.rb
+++ b/lib/colorls/flags.rb
@@ -261,7 +261,7 @@ def parse_options
       end
 
       # show help and exit if the only argument is -h
-      show_help if !@args.empty? && @args.all? { |arg| arg == '-h' }
+      show_help if !@args.empty? && @args.all?('-h')
 
       @parser.parse!(@args)