diff --git a/bogus.gemspec b/bogus.gemspec
index 50fe8ab..caba9a1 100644
--- a/bogus.gemspec
+++ b/bogus.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'cucumber'
-  s.add_development_dependency 'aruba'
+  s.add_development_dependency 'aruba', '~> 0.9.0'
 
   s.add_development_dependency 'guard'
   s.add_development_dependency 'guard-rspec'