diff --git a/.travis.yml b/.travis.yml
index f93bca740..0ec2a830c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,3 +23,5 @@ gemfile:
   - gemfiles/rails_3.gemfile
   - gemfiles/rails_4.gemfile
   - gemfiles/rack_1.5.2.gemfile
+
+bundler_args: --without development
diff --git a/Gemfile b/Gemfile
index 6a46bf87c..533afd993 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,9 +1,30 @@
+# when changing this file, run appraisal install ; rubocop -a gemfiles/*
+
 source 'https://rubygems.org'
 
 gemspec
 
 group :development, :test do
+  gem 'bundler'
+  gem 'rake'
+  gem 'rubocop', '0.35.1'
+end
+
+group :development do
   gem 'guard'
   gem 'guard-rspec'
   gem 'guard-rubocop'
+  gem 'yard'
+  gem 'appraisal'
+  gem 'benchmark-ips'
+end
+
+group :test do
+  gem 'grape-entity', '0.5.0'
+  gem 'maruku'
+  gem 'rack-test'
+  gem 'rspec', '~> 3.0'
+  gem 'cookiejar'
+  gem 'rack-contrib'
+  gem 'mime-types', '< 3.0'
 end
diff --git a/Rakefile b/Rakefile
index 242685393..0aa5e5709 100644
--- a/Rakefile
+++ b/Rakefile
@@ -23,43 +23,47 @@ RuboCop::RakeTask.new
 
 task default: [:rubocop, :spec]
 
-require 'yard'
-DOC_FILES = ['lib/**/*.rb', 'README.md']
+begin
+  require 'yard'
+  DOC_FILES = ['lib/**/*.rb', 'README.md']
 
-YARD::Rake::YardocTask.new(:doc) do |t|
-  t.files = DOC_FILES
-end
-
-namespace :doc do
-  YARD::Rake::YardocTask.new(:pages) do |t|
-    t.files   = DOC_FILES
-    t.options = ['-o', '../grape.doc/docs']
+  YARD::Rake::YardocTask.new(:doc) do |t|
+    t.files = DOC_FILES
   end
 
-  namespace :pages do
-    desc 'Check out gh-pages.'
-    task :checkout do
-      dir = File.dirname(__FILE__) + '/../grape.doc'
-      unless Dir.exist?(dir)
-        Dir.mkdir(dir)
-        Dir.chdir(dir) do
-          system('git init')
-          system('git remote add origin git@github.com:ruby-grape/grape.git')
-          system('git pull')
-          system('git checkout gh-pages')
+  namespace :doc do
+    YARD::Rake::YardocTask.new(:pages) do |t|
+      t.files   = DOC_FILES
+      t.options = ['-o', '../grape.doc/docs']
+    end
+
+    namespace :pages do
+      desc 'Check out gh-pages.'
+      task :checkout do
+        dir = File.dirname(__FILE__) + '/../grape.doc'
+        unless Dir.exist?(dir)
+          Dir.mkdir(dir)
+          Dir.chdir(dir) do
+            system('git init')
+            system('git remote add origin git@github.com:ruby-grape/grape.git')
+            system('git pull')
+            system('git checkout gh-pages')
+          end
         end
       end
-    end
 
-    desc 'Generate and publish YARD docs to GitHub pages.'
-    task publish: ['doc:pages:checkout', 'doc:pages'] do
-      Dir.chdir(File.dirname(__FILE__) + '/../grape.doc') do
-        system('git checkout gh-pages')
-        system('git add .')
-        system('git add -u')
-        system("git commit -m 'Generating docs for version #{Grape::VERSION}.'")
-        system('git push origin gh-pages')
+      desc 'Generate and publish YARD docs to GitHub pages.'
+      task publish: ['doc:pages:checkout', 'doc:pages'] do
+        Dir.chdir(File.dirname(__FILE__) + '/../grape.doc') do
+          system('git checkout gh-pages')
+          system('git add .')
+          system('git add -u')
+          system("git commit -m 'Generating docs for version #{Grape::VERSION}.'")
+          system('git push origin gh-pages')
+        end
       end
     end
   end
+rescue LoadError # rubocop:disable Lint/HandleExceptions
+  # ignore
 end
diff --git a/gemfiles/rack_1.5.2.gemfile b/gemfiles/rack_1.5.2.gemfile
index 3ba7ea3a7..ea96ee147 100644
--- a/gemfiles/rack_1.5.2.gemfile
+++ b/gemfiles/rack_1.5.2.gemfile
@@ -5,9 +5,28 @@ source 'https://rubygems.org'
 gem 'rack', '1.5.2'
 
 group :development, :test do
+  gem 'bundler'
+  gem 'rake'
+  gem 'rubocop', '0.35.1'
+end
+
+group :development do
   gem 'guard'
   gem 'guard-rspec'
   gem 'guard-rubocop'
+  gem 'yard'
+  gem 'appraisal'
+  gem 'benchmark-ips'
+end
+
+group :test do
+  gem 'grape-entity', '0.5.0'
+  gem 'maruku'
+  gem 'rack-test'
+  gem 'rspec', '~> 3.0'
+  gem 'cookiejar'
+  gem 'rack-contrib'
+  gem 'mime-types', '< 3.0'
 end
 
 gemspec path: '../'
diff --git a/gemfiles/rails_3.gemfile b/gemfiles/rails_3.gemfile
index 55a7d5747..cd4dfbc0f 100644
--- a/gemfiles/rails_3.gemfile
+++ b/gemfiles/rails_3.gemfile
@@ -2,13 +2,32 @@
 
 source 'https://rubygems.org'
 
-gem 'rails', '3.2.22'
+gem 'rails', '3.2.19'
 gem 'rack-cache', '<= 1.2'
 
 group :development, :test do
+  gem 'bundler'
+  gem 'rake'
+  gem 'rubocop', '0.35.1'
+end
+
+group :development do
   gem 'guard'
   gem 'guard-rspec'
   gem 'guard-rubocop'
+  gem 'yard'
+  gem 'appraisal'
+  gem 'benchmark-ips'
+end
+
+group :test do
+  gem 'grape-entity', '0.5.0'
+  gem 'maruku'
+  gem 'rack-test'
+  gem 'rspec', '~> 3.0'
+  gem 'cookiejar'
+  gem 'rack-contrib'
+  gem 'mime-types', '< 3.0'
 end
 
 gemspec path: '../'
diff --git a/gemfiles/rails_4.gemfile b/gemfiles/rails_4.gemfile
index 8c386c724..136ec2b81 100644
--- a/gemfiles/rails_4.gemfile
+++ b/gemfiles/rails_4.gemfile
@@ -5,9 +5,28 @@ source 'https://rubygems.org'
 gem 'rails', '4.1.6'
 
 group :development, :test do
+  gem 'bundler'
+  gem 'rake'
+  gem 'rubocop', '0.35.1'
+end
+
+group :development do
   gem 'guard'
   gem 'guard-rspec'
   gem 'guard-rubocop'
+  gem 'yard'
+  gem 'appraisal'
+  gem 'benchmark-ips'
+end
+
+group :test do
+  gem 'grape-entity', '0.5.0'
+  gem 'maruku'
+  gem 'rack-test'
+  gem 'rspec', '~> 3.0'
+  gem 'cookiejar'
+  gem 'rack-contrib'
+  gem 'mime-types', '< 3.0'
 end
 
 gemspec path: '../'
diff --git a/grape.gemspec b/grape.gemspec
index c6529951c..328781b18 100644
--- a/grape.gemspec
+++ b/grape.gemspec
@@ -22,20 +22,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'virtus', '>= 1.0.0'
   s.add_runtime_dependency 'builder'
 
-  s.add_development_dependency 'grape-entity', '0.5.0'
-  s.add_development_dependency 'rake', '~> 10'
-  s.add_development_dependency 'maruku'
-  s.add_development_dependency 'yard'
-  s.add_development_dependency 'rack-test'
-  s.add_development_dependency 'rspec', '~> 3.0'
-  s.add_development_dependency 'bundler'
-  s.add_development_dependency 'cookiejar'
-  s.add_development_dependency 'rack-contrib'
-  s.add_development_dependency 'mime-types', '< 3.0'
-  s.add_development_dependency 'appraisal'
-  s.add_development_dependency 'benchmark-ips'
-  s.add_development_dependency 'rubocop', '0.35.1'
-
   s.files         = Dir['**/*'].keep_if { |file| File.file?(file) }
   s.test_files    = Dir['spec/**/*']
   s.require_paths = ['lib']