diff --git a/sensu-plugins-ipmi.gemspec b/sensu-plugins-ipmi.gemspec
index 041cd10..429c156 100644
--- a/sensu-plugins-ipmi.gemspec
+++ b/sensu-plugins-ipmi.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'sensu-plugin',  '~> 1.2'
   s.add_runtime_dependency 'rubyipmi',      '0.10.0'
 
-  s.add_development_dependency 'bundler',                   '~> 1.7'
+  s.add_development_dependency 'bundler',                   '~> 2.1'
   s.add_development_dependency 'codeclimate-test-reporter', '~> 0.4'
   s.add_development_dependency 'github-markup',             '~> 3.0'
   s.add_development_dependency 'pry',                       '~> 0.10'