diff --git a/Gemfile b/Gemfile
index 7f3dc99692c2bd4bbf0426736555693e4d73b5f7..3d483dd94fe84f1009e9fa3aa4841b879b9a0b6e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,11 +2,3 @@ source 'http://rubygems.org'
 
 # Specify your gem's dependencies in omniauth-msunet.gemspec
 gemspec
-
-group :development, :test do
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-bundler'
-  gem 'rb-fsevent'
-  gem 'growl'
-end
diff --git a/omniauth-msunet.gemspec b/omniauth-msunet.gemspec
index 5e7a39624fef11f4bc8f86e76aa1e23c98a25b90..1b2b80656d832cd283ebc5002fba507f616409c6 100644
--- a/omniauth-msunet.gemspec
+++ b/omniauth-msunet.gemspec
@@ -19,8 +19,5 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'omniauth', '~> 1.1'
   gem.add_dependency 'omniauth-oauth2', '~> 1.1'
   gem.add_dependency 'multi_json', '~> 1.7'
-  gem.add_development_dependency 'rspec', '~> 2.7'
-  gem.add_development_dependency 'rack-test'
-  gem.add_development_dependency 'simplecov'
-  gem.add_development_dependency 'webmock'
+  gem.add_development_dependency 'rspec', '~> 3.4'
 end