diff --git a/test/gemfiles/rails_4_2.gemfile b/test/gemfiles/rails_4_2.gemfile
index 392c686d..2ed22bd7 100644
--- a/test/gemfiles/rails_4_2.gemfile
+++ b/test/gemfiles/rails_4_2.gemfile
@@ -3,5 +3,6 @@ source 'https://rubygems.org'
 gem 'actionpack', '~> 4.2.7'
 gem 'activesupport', '~> 4.2.7'
 gem 'sassc-rails', '~> 2.0'
+gem 'bigdecimal', '1.3.5'
 
 gemspec path: '../../'