diff --git a/sensu-plugins-gitlab.gemspec b/sensu-plugins-gitlab.gemspec
index b1a622e..89b3b20 100644
--- a/sensu-plugins-gitlab.gemspec
+++ b/sensu-plugins-gitlab.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |s| # rubocop:disable Metrics/BlockLength
   s.add_runtime_dependency 'sensu-plugin', '~> 2.0'
 
   s.add_development_dependency 'bundler',                   '~> 1.15'
-  s.add_development_dependency 'github-markup',             '~> 1.3'
+  s.add_development_dependency 'github-markup',             '~> 4.0'
   s.add_development_dependency 'kitchen-docker',            '~> 2.6'
   s.add_development_dependency 'kitchen-localhost',         '~> 0.3'
   # locked to keep ruby 2.1 support, this is pulled in by test-kitchen