diff --git a/simplecov.gemspec b/simplecov.gemspec
index 39e03fbf..eb3242d4 100644
--- a/simplecov.gemspec
+++ b/simplecov.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "cucumber", "~> 1.0.0"
   s.add_development_dependency "rake", "<= 0.9.0" # This is required since 0.9.1 breaks compatibility with Ruby 1.8.6...
   s.add_development_dependency "rspec", ">= 2.6.0"
-  s.add_development_dependency "shoulda", "2.10.3"
+  s.add_development_dependency "shoulda", "~> 2.10.3"
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")