diff --git a/Gemfile b/Gemfile
index 6fd2e85..ff1de43 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,7 +23,7 @@
 source 'https://rubygems.org'
 gemspec
 
-gem 'minitest', '5.19.0', require: false
+gem 'minitest', '5.20.0', require: false
 gem 'rake', '13.1.0', require: false
 gem 'rdoc', '6.5.0', require: false
 gem 'rubocop', '1.57.1', require: false