diff --git a/gemfiles/rails30.gemfile b/gemfiles/rails30.gemfile
index 6349d202..208a5aba 100644
--- a/gemfiles/rails30.gemfile
+++ b/gemfiles/rails30.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source 'https://rubygems.org'
 
@@ -36,4 +36,8 @@ gem 'database_cleaner', '~> 1.0.0'
 gem 'genspec', '>= 0.2.8'
 gem 'girl_friday', '>= 0.11.1'
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => '../'
diff --git a/gemfiles/rails31.gemfile b/gemfiles/rails31.gemfile
index 0cb0a766..23c14131 100644
--- a/gemfiles/rails31.gemfile
+++ b/gemfiles/rails31.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source "https://rubygems.org"
 
@@ -34,4 +34,8 @@ gem 'database_cleaner'
 gem 'girl_friday'
 gem 'generator_spec'
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => "../"
diff --git a/gemfiles/rails32.gemfile b/gemfiles/rails32.gemfile
index 0ebb7c51..7f7f735d 100644
--- a/gemfiles/rails32.gemfile
+++ b/gemfiles/rails32.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source "https://rubygems.org"
 
@@ -36,4 +36,8 @@ gem 'database_cleaner', '~> 1.0.0'
 gem 'girl_friday', '>= 0.11.1'
 gem 'generator_spec'
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => "../"
diff --git a/gemfiles/rails40.gemfile b/gemfiles/rails40.gemfile
index 14fc01f1..02631a9e 100644
--- a/gemfiles/rails40.gemfile
+++ b/gemfiles/rails40.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source "https://rubygems.org"
 
@@ -36,4 +36,8 @@ gem 'database_cleaner', '~> 1.0.0'
 gem 'girl_friday', '>= 0.11.1'
 gem 'generator_spec'
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => "../"
diff --git a/gemfiles/rails41.gemfile b/gemfiles/rails41.gemfile
index e322f99d..623ed2d5 100644
--- a/gemfiles/rails41.gemfile
+++ b/gemfiles/rails41.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source "https://rubygems.org"
 
@@ -34,4 +34,8 @@ gem 'database_cleaner', '~> 1.0.0'
 gem 'girl_friday', '>= 0.11.1'
 gem 'generator_spec'
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => "../"
diff --git a/gemfiles/rails42.gemfile b/gemfiles/rails42.gemfile
index 09ff3108..449a9bc4 100644
--- a/gemfiles/rails42.gemfile
+++ b/gemfiles/rails42.gemfile
@@ -1,4 +1,4 @@
-# This file was generated by Appraisal
+require 'rubygems/version'
 
 source "https://rubygems.org"
 
@@ -34,4 +34,8 @@ gem 'girl_friday', '>= 0.11.1'
 gem 'generator_spec'
 gem 'codeclimate-test-reporter', :group => :test, :require => nil
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0')
+  gem 'mime-types', '< 3.0'
+end
+
 gemspec :path => "../"