diff --git a/sensu-plugins-telegram.gemspec b/sensu-plugins-telegram.gemspec
index 0651b09..43afd61 100644
--- a/sensu-plugins-telegram.gemspec
+++ b/sensu-plugins-telegram.gemspec
@@ -40,7 +40,7 @@ Gem::Specification.new do |s| # rubocop:disable Metrics/BlockLength
   s.add_runtime_dependency 'rest-client',  '~> 2.0'
   s.add_runtime_dependency 'sensu-plugin', '>= 2.7', '< 5.0'
 
-  s.add_development_dependency 'bundler',                   '~> 1.7'
+  s.add_development_dependency 'bundler',                   '~> 2.2'
   s.add_development_dependency 'codeclimate-test-reporter', '~> 1.0'
   s.add_development_dependency 'github-markup',             '~> 3.0'
   s.add_development_dependency 'pry',                       '~> 0.10'