diff --git a/Gemfile b/Gemfile
index e99ebc2..dcd15b6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ group(:development, :test) do
 end
 
 group(:development) do
-  gem('debug', '~> 1.9.0', require: false)
+  gem('debug', '~> 1.9.1', require: false)
   gem('yard', '~> 0.9.34', require: false)
   gem('benchmark-ips', '~> 2.13.0', require: false)
   gem('rubocop', '~> 1.59.0', require: false)