diff --git a/emailable.gemspec b/emailable.gemspec
index 415a7a4..f2d1d4f 100644
--- a/emailable.gemspec
+++ b/emailable.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'amazing_print'
-  s.add_development_dependency 'minitest', '~> 5.0'
+  s.add_development_dependency 'minitest', '~> 6.0'
   s.add_development_dependency 'minitest-reporters'
   s.add_development_dependency 'activemodel'
   s.add_development_dependency 'rubocop-cache-ventures'