diff --git a/jekyll.gemspec b/jekyll.gemspec
index 06dc2e56..1608ce76 100644
--- a/jekyll.gemspec
+++ b/jekyll.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency('rake', "~> 10.1")
   s.add_development_dependency('rdoc', "~> 3.11")
   s.add_development_dependency('redgreen', "~> 1.2")
-  s.add_development_dependency('shoulda', "~> 3.3.2")
+  s.add_development_dependency('shoulda', "~> 3.5")
   s.add_development_dependency('rr', "~> 1.1")
   s.add_development_dependency('cucumber', "~> 1.3")
   s.add_development_dependency('RedCloth', "~> 4.2")