diff --git a/Gemfile b/Gemfile
index 4910ed9..07e86cd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source "http://rubygems.org"
 #development dependencies
 group :development do
   gem "shoulda", ">= 0"
-  gem "bundler", "~> 1.0.0"
+  gem "bundler", "~> 1.1.rc.7"
   gem "jeweler", "~> 1.5.1"
   gem "rcov", ">= 0"
   gem "bio", ">= 1.4.1"