diff --git a/aruba.gemspec b/aruba.gemspec
index a22e421b1..9ed553fa1 100644
--- a/aruba.gemspec
+++ b/aruba.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
   s.email       = 'cukes@googlegroups.com'
   s.homepage    = 'http://github.com/cucumber/aruba'
 
-  s.add_runtime_dependency 'cucumber', '~> 2.3.0'
+  s.add_runtime_dependency 'cucumber', '~> 2.4.0'
   s.add_runtime_dependency 'childprocess', '~> 0.5.6'
   s.add_runtime_dependency 'ffi', '~> 1.9.10'
   s.add_runtime_dependency 'rspec-expectations', '~> 3.4.0'