Index: Gemfile
===================================================================
--- Gemfile	(revision 19337)
+++ Gemfile	(working copy)
@@ -80,7 +80,7 @@
   gem "simplecov", "~> 0.17.0", :require => false
   gem "ffi", platforms: [:mingw, :x64_mingw, :mswin]
   # For running system tests
-  gem 'puma', '~> 3.7'
+  gem 'puma', '~> 4.3.1'
   gem "capybara", (RUBY_VERSION < "2.4" ? "~> 3.15.1" : "~> 3.29.0")
   gem "selenium-webdriver"
   # RuboCop