diff --git a/logstash-output-jdbc.gemspec b/logstash-output-jdbc.gemspec
index b4876d3..a4b0638 100644
--- a/logstash-output-jdbc.gemspec
+++ b/logstash-output-jdbc.gemspec
@@ -34,5 +34,5 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'logstash-devutils'
 
-  s.add_development_dependency 'rubocop'
+  s.add_development_dependency 'rubocop', '0.41.2'
 end