diff --git a/sms-spec.gemspec b/sms-spec.gemspec
index fd6c3ca..e17c19d 100644
--- a/sms-spec.gemspec
+++ b/sms-spec.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency 'rspec', "~> 2.11"
+  s.add_dependency 'rspec', ">= 2.11"
   s.add_development_dependency "rake"
   s.add_development_dependency "twilio-ruby", "~> 3.0"
   s.add_development_dependency "lookout-clickatell", "~> 0.8"