diff --git a/sensu-plugins-solr.gemspec b/sensu-plugins-solr.gemspec
index 78d5056..f16d3f5 100644
--- a/sensu-plugins-solr.gemspec
+++ b/sensu-plugins-solr.gemspec
@@ -36,7 +36,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'nokogiri',          '1.6.8.1'
 
   s.add_development_dependency 'codeclimate-test-reporter', '~> 0.4'
-  s.add_development_dependency 'rubocop',                   '~> 0.40.0'
+  s.add_development_dependency 'rubocop',                   '~> 0.50.0'
   s.add_development_dependency 'rspec',                     '~> 3.1'
   s.add_development_dependency 'bundler',                   '~> 1.7'
   s.add_development_dependency 'rake',                      '~> 12.3'