Gemfile in asciidoctor-epub3-1.5.0.alpha.17 vs Gemfile in asciidoctor-epub3-1.5.0.alpha.18

@@ -11,10 +11,10 @@
   gem 'asciidoctor-diagram', '1.5.16', require: false if Gem::Version.new(ENV['ASCIIDOCTOR_VERSION']) < Gem::Version.new('2.0.0')
 end
 
 group :optional do
   # epubcheck-ruby might be safe to be converted into runtime dependency, but could have issues when packaged into asciidoctorj-epub3
-  gem 'epubcheck-ruby', '~> 4.2.2.0'
+  gem 'epubcheck-ruby', '~> 4.2.4.0'
   # We would like to make kindlegen a runtime dependency, but can't because of the way asciidoctorj-epub3 packaging works
   # See https://github.com/asciidoctor/asciidoctor-epub3/issues/288
   gem 'kindlegen', '~> 3.0.3'
 end