diff --git a/gemfiles/rails_5.0.gemfile b/gemfiles/rails_5.0.gemfile
index e38836d1..6a35c99f 100644
--- a/gemfiles/rails_5.0.gemfile
+++ b/gemfiles/rails_5.0.gemfile
@@ -2,6 +2,8 @@ source "https://rubygems.org"
 
 gem "rails", "~> 5.0.0"
 
+gem 'loofah', '~> 2.20.0'
+
 # Fix code coverage on old Ruby versions
 if RUBY_VERSION < '2.5'
   gem 'simplecov', '< 0.18.0'