diff --git a/rspec-mocks.gemspec b/rspec-mocks.gemspec
index eda163354..c9bf21afd 100644
--- a/rspec-mocks.gemspec
+++ b/rspec-mocks.gemspec
@@ -23,5 +23,5 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rake',     '~> 10.0.0'
   s.add_development_dependency 'cucumber', '~> 1.1.9'
-  s.add_development_dependency 'aruba',    '~> 0.5'
+  s.add_development_dependency 'aruba',    '0.6.1'
 end