diff --git a/Gemfile b/Gemfile
index 785fb73c3..c8268b97d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gem 'prototype-rails', '3.2.1'
 gem "i18n", "~> 0.6.0"
 gem "coderay", "~> 1.0.6"
 gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby]
-gem "builder"
+gem "builder", "3.0.0"
 
 # Optional gem for LDAP authentication
 group :ldap do