diff --git a/lib/rb/thrift.gemspec b/lib/rb/thrift.gemspec
index 99856e8..299db08 100644
--- a/lib/rb/thrift.gemspec
+++ b/lib/rb/thrift.gemspec
@@ -28,7 +28,7 @@
   s.require_paths = %w[lib ext]
 
   s.add_development_dependency 'rake'
-  s.add_development_dependency 'rspec', '~> 2.11.0'
+  s.add_development_dependency 'rspec', '~> 2.10.0'
   s.add_development_dependency 'mongrel', "1.2.0.pre2"
 end