diff --git a/Gemfile b/Gemfile
index 593c37dc1d85045766475e2d65beeba89548e336..45b61178246d81987448383bef7d5cb4c6cc6a6e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,4 +5,5 @@ gemspec
 group :development, :test do
   gem 'rake'
   gem 'mongoid'
+  gem 'bson_ext'
 end
\ No newline at end of file