diff --git a/.travis.yml b/.travis.yml
index 8cabd1a6..ae140d47 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 before_install:
   - gem update bundler
+bundler_args: --without development
 rvm:
   - 1.9.3
   - 2.0.0
diff --git a/Gemfile b/Gemfile
index 851fabc2..89ed8bd4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,9 @@
 source 'https://rubygems.org'
-gemspec
+gemspec development_group: :test
+
+group :development do
+  gem 'guard-bundler'
+  gem 'guard-minitest'
+  gem 'guard'
+  gem 'pry'
+end
diff --git a/omniauth-openid-connect.gemspec b/omniauth-openid-connect.gemspec
index 5fad920c..3af0ce89 100644
--- a/omniauth-openid-connect.gemspec
+++ b/omniauth-openid-connect.gemspec
@@ -21,15 +21,14 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'omniauth', '~> 1.1'
   spec.add_dependency 'openid_connect', '~> 0.9.2'
   spec.add_dependency 'addressable', '~> 2.3'
+  if RUBY_VERSION < '2.0'
+    spec.add_dependency 'mime-types', '~> 2.99.2'
+  end
   spec.add_development_dependency "bundler", "~> 1.5"
   spec.add_development_dependency "minitest"
   spec.add_development_dependency "mocha"
-  spec.add_development_dependency "guard"
-  spec.add_development_dependency "guard-minitest"
-  spec.add_development_dependency "guard-bundler"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "simplecov"
-  spec.add_development_dependency "pry"
   spec.add_development_dependency "coveralls"
   spec.add_development_dependency "faker"
 end