diff --git a/fluent-plugin-influxdb-v2.gemspec b/fluent-plugin-influxdb-v2.gemspec
index 083039b..2a62083 100644
--- a/fluent-plugin-influxdb-v2.gemspec
+++ b/fluent-plugin-influxdb-v2.gemspec
@@ -53,7 +53,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'minitest', '~> 5.0'
   spec.add_development_dependency 'minitest-reporters', '~> 1.4'
   spec.add_development_dependency 'rake', '>= 12.3.3'
-  spec.add_development_dependency 'rubocop', '~> 0.66.0'
+  spec.add_development_dependency 'rubocop', '~> 0.68.1'
   spec.add_development_dependency 'simplecov-cobertura', '~> 1.4.2'
   spec.add_development_dependency 'test-unit', '~> 3.3'
   spec.add_development_dependency 'webmock', '~> 3.7'