Gemfile in yard-cucumber-3.1.0 vs Gemfile in yard-cucumber-4.0.0

@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
 gem 'redcarpet'
-gem 'gherkin', '~> 4.0'
+gem 'gherkin', '>= 4.0', '< 6.0'
 
 gemspec