diff --git a/.travis.yml b/.travis.yml
index d86d51f..cfd8f25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,9 @@
+language: ruby
 rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - jruby
-  - rbx
-  - ree
+  - jruby-18mode
+  - jruby-19mode
+  - rbx-18mode
+  - rbx-19mode
diff --git a/README.md b/README.md
index 236e3e7..e0c98cd 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,6 @@ implementations:
 * Ruby 1.9.3
 * [JRuby](http://www.jruby.org/)
 * [Rubinius](http://rubini.us/)
-* [Ruby Enterprise Edition](http://www.rubyenterpriseedition.com/)
 
 If something doesn't work on one of these interpreters, it should be considered
 a bug.
diff --git a/simple_oauth.gemspec b/simple_oauth.gemspec
index c65952d..5a675f7 100644
--- a/simple_oauth.gemspec
+++ b/simple_oauth.gemspec
@@ -2,11 +2,11 @@
 require File.expand_path('../lib/simple_oauth/version', __FILE__)
 
 Gem::Specification.new do |gem|
-  gem.add_development_dependency 'minitest', '~> 2.3'
-  gem.add_development_dependency 'mocha', '~> 0.9'
-  gem.add_development_dependency 'rake', '~> 0.9'
-  gem.add_development_dependency 'simplecov', '~> 0.4'
-  gem.add_development_dependency 'yard', '~> 0.7'
+  gem.add_development_dependency 'minitest'
+  gem.add_development_dependency 'mocha', '~> 0.9.0'
+  gem.add_development_dependency 'rake'
+  gem.add_development_dependency 'simplecov'
+  gem.add_development_dependency 'yard'
   gem.authors = ["Steve Richert", "Erik Michaels-Ober"]
   gem.description = 'Simply builds and verifies OAuth headers'
   gem.email = ['steve.richert@gmail.com', 'sferik@gmail.com']