diff --git a/.travis.yml b/.travis.yml
index b889f1c9..18b36721 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,9 +6,9 @@ install: travis_retry bundle install --without=benchmark
 
 rvm:
   - 2.0.0
-  - 2.1
-  - 2.2
-  - ruby-head
-
+  - 2.1.10
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0
 notifications:
   email: false
diff --git a/greenmat.gemspec b/greenmat.gemspec
index 4aba7551..05cddaec 100644
--- a/greenmat.gemspec
+++ b/greenmat.gemspec
@@ -24,6 +24,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "nokogiri", "~> 1.6.0"
   s.add_development_dependency "rake-compiler", "~> 0.8.3"
   s.add_development_dependency "rspec", "~> 3.2"
-  s.add_development_dependency "rubygems-xcodeproj_generator", '~> 0.1'
   s.add_development_dependency "test-unit", "~> 2.5.4"
 end
diff --git a/tasks/generate_xcode_project.rake b/tasks/generate_xcode_project.rake
deleted file mode 100644
index 0c93f7b1..00000000
--- a/tasks/generate_xcode_project.rake
+++ /dev/null
@@ -1,5 +0,0 @@
-require 'rubygems/xcodeproj_generator/rake_task'
-
-Rubygems::XcodeprojGenerator::RakeTask.new do |project|
-  project.build_command = 'bundle exec rake compile'
-end