diff --git a/sidekiq.gemspec b/sidekiq.gemspec
index f47ee8a3..35313a2d 100644
--- a/sidekiq.gemspec
+++ b/sidekiq.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency                  'connection_pool', '~> 0.9.2'
   gem.add_dependency                  'celluloid', '~> 0.12.0'
   gem.add_dependency                  'multi_json', '~> 1'
-  gem.add_development_dependency      'minitest', '~> 3'
+  gem.add_development_dependency      'minitest', '~> 4'
   gem.add_development_dependency      'sinatra'
   gem.add_development_dependency      'slim'
   gem.add_development_dependency      'rake'