diff --git a/gemfiles/active_record_32.gemfile b/gemfiles/active_record_32.gemfile
index 147bc39..2f7772a 100644
--- a/gemfiles/active_record_32.gemfile
+++ b/gemfiles/active_record_32.gemfile
@@ -3,5 +3,8 @@ source :rubygems
 gem 'railties', '>= 3.2.3'
 gem 'activerecord', '>= 3.2.3', :require => 'active_record'
 gem 'rspec-rails', '>= 2.0'
+gem 'nokogiri'
+gem 'xpath'
+gem 'mime-types'
 
 gemspec :path => '../'
diff --git a/gemfiles/data_mapper_12.gemfile b/gemfiles/data_mapper_12.gemfile
index 2e0919c..648a6f9 100644
--- a/gemfiles/data_mapper_12.gemfile
+++ b/gemfiles/data_mapper_12.gemfile
@@ -8,5 +8,8 @@ gem 'dm-transactions', '>= 1.2.0'
 gem 'dm-active_model', '>= 1.2.0'
 gem 'dm-sqlite-adapter', '>= 1.2.0'
 gem 'rspec-rails', '>= 2.0'
+gem 'nokogiri'
+gem 'xpath'
+gem 'mime-types'
 
 gemspec :path => '../'
diff --git a/gemfiles/mongo_mapper.gemfile b/gemfiles/mongo_mapper.gemfile
index 64b404e..91276b1 100644
--- a/gemfiles/mongo_mapper.gemfile
+++ b/gemfiles/mongo_mapper.gemfile
@@ -3,5 +3,8 @@ source :rubygems
 gem 'railties', '>= 3.2.3'
 gem 'mongo_mapper', '>= 0.11.0'
 gem 'rspec-rails', '>= 2.0'
+gem 'nokogiri'
+gem 'xpath'
+gem 'mime-types'
 
 gemspec :path => '../'
diff --git a/gemfiles/mongoid_30.gemfile b/gemfiles/mongoid_30.gemfile
index d1cc0fd..ab3c7e2 100644
--- a/gemfiles/mongoid_30.gemfile
+++ b/gemfiles/mongoid_30.gemfile
@@ -3,5 +3,10 @@ source :rubygems
 gem 'railties', '>= 3.2.3'
 gem 'mongoid', '>= 3.0'
 gem 'rspec-rails', '>= 2.0'
+gem 'origin'
+gem 'moped'
+gem 'nokogiri'
+gem 'xpath'
+gem 'mime-types'
 
 gemspec :path => '../'
diff --git a/gemfiles/sinatra.gemfile b/gemfiles/sinatra.gemfile
index 6edba0b..4651735 100644
--- a/gemfiles/sinatra.gemfile
+++ b/gemfiles/sinatra.gemfile
@@ -5,6 +5,8 @@ gem 'sinatra', '>= 1.3'
 gem 'padrino-helpers', '>= 0.10.6.c'
 gem 'rack-test', '>= 0'
 gem 'sinatra-contrib', '>= 1.3'
-gem 'nokogiri', '>= 0'
+gem 'nokogiri'
+gem 'xpath'
+gem 'mime-types'
 
 gemspec :path => '../'