--- a/shoulda.gemspec
+++ b/shoulda.gemspec
@@ -26,5 +26,5 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
 
   s.add_dependency('shoulda-context', '~> 2.0')
-  s.add_dependency('shoulda-matchers', '~> 4.0')
+  s.add_dependency('shoulda-matchers', '>= 4.0')
 end