diff --git a/shoulda-matchers.gemspec b/shoulda-matchers.gemspec
index ad72d023..fac570ad 100644
--- a/shoulda-matchers.gemspec
+++ b/shoulda-matchers.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.add_dependency('activesupport', '>= 3.0.0')
   s.add_dependency('bourne',        '~> 1.1.2')
 
-  s.add_development_dependency('appraisal',   '~> 0.4.0')
+  s.add_development_dependency('appraisal',   '~> 0.4')
   s.add_development_dependency('aruba')
   s.add_development_dependency('bundler',     '~> 1.1')
   s.add_development_dependency('cucumber',    '~> 1.1')