diff --git a/sensu-plugins-slack.gemspec b/sensu-plugins-slack.gemspec
index 34547a1..a53daf7 100644
--- a/sensu-plugins-slack.gemspec
+++ b/sensu-plugins-slack.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'pry',                       '~> 0.10'
   s.add_development_dependency 'rake',                      '~> 10.0'
   s.add_development_dependency 'redcarpet',                 '~> 3.2'
-  s.add_development_dependency 'rubocop',                   '~> 0.40.0'
+  s.add_development_dependency 'rubocop',                   '~> 0.80.1'
   s.add_development_dependency 'rspec',                     '~> 3.1'
   s.add_development_dependency 'yard',                      '~> 0.8'
 end