Gemfile in dpl-1.6.6.travis.492.1 vs Gemfile in dpl-1.6.6.travis.496.1

@@ -37,9 +37,10 @@
   gem 'ninefold'
 end
 
 group :gcs do
   gem 'gstore'
+  gem 'mime-types'
 end
 
 group :gae do
   gem 'rubyzip'
 end