diff --git a/Gemfile b/Gemfile
index 040baf60..e1c3c2d4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gemspec
 group(:development, :test) do
   gem('rake', '~> 13.2.1')
   gem('irb', '~> 1.14.3')
-  gem('irb-power_assert', '0.3.1')
+  gem('irb-power_assert', '0.4.0')
   gem('perfect_toml', '~> 0.9.0', require: false)
 end