diff --git a/lib/rb/thrift.gemspec b/lib/rb/thrift.gemspec
index 2b6ea80..a91ea07 100644
--- a/lib/rb/thrift.gemspec
+++ b/lib/rb/thrift.gemspec
@@ -31,7 +31,7 @@
   s.add_development_dependency "rack", "~> 1.5.2"
   s.add_development_dependency "rack-test", "~> 0.6.2"
   s.add_development_dependency "thin", "~> 1.5.0"
-  s.add_development_dependency "bundler", "~> 1.3.1"
+  s.add_development_dependency "bundler"
   s.add_development_dependency 'rake'
 end