Rakefile in bonsai-1.3.1 vs Rakefile in bonsai-1.3.2

@@ -1,21 +1,6 @@
 # coding: utf-8
-begin
-  require "rubygems"
-  require "bundler"
-  Bundler.setup
-rescue LoadError
-  raise <<-HELP
-    Bonsai uses the gem bundler to handle its development dependencies under 
-    multiple environments. So if you're testing under 1.8, 1.9.x, jruby or otherwise
-    you should ensure that you have the `bundler` gem installed.
-    
-    Then run `gem bundle`. Following going through these steps you should
-    not see this error message. If you do, please contact me or raise an issue.
-      (http://github.com/benschwarz/bonsai/issues)
-  HELP
-end
 
 require 'rake'
 
 begin
   require 'jeweler'
@@ -30,20 +15,20 @@
     gem.has_rdoc = false
     gem.files.exclude 'vendor/gems'
     
     gem.add_development_dependency "rspec", ">= 1.3.0"
     gem.add_development_dependency "yard", ">= 0"
-    gem.add_dependency "tilt", "= 0.5"
-    gem.add_dependency "mustache", "= 0.5.0"
-    gem.add_dependency "builder", "= 2.1.2"
-    gem.add_dependency "watch", "= 0.1.0"
-    gem.add_dependency "sinatra", "= 0.9.4"
-    gem.add_dependency "maruku", "= 0.6.0"
-    gem.add_dependency "less", "= 1.2.17"
-    gem.add_dependency "rack", "= 1.1.0"
-    gem.add_dependency "launchy", "= 0.3.3"
-    gem.add_dependency "activesupport", "= 2.3.5"
+    gem.add_dependency "tilt", ">= 0.5"
+    gem.add_dependency "mustache", ">= 0.5.0"
+    gem.add_dependency "builder", ">= 2.1.2"
+    gem.add_dependency "watch", ">= 0.1.0"
+    gem.add_dependency "sinatra", ">= 0.9.4"
+    gem.add_dependency "maruku", ">= 0.6.0"
+    gem.add_dependency "less", ">= 1.2.17"
+    gem.add_dependency "rack", ">= 1.2.1"
+    gem.add_dependency "launchy", ">= 0.3.3"
+    gem.add_dependency "activesupport", ">= 2.3.5"
 
     gem.post_install_message = %q{
 
       盆栽
       bonsai, tiny and beautiful
@@ -58,22 +43,17 @@
   Jeweler::GemcutterTasks.new
 rescue LoadError
   puts "Jeweler (or a dependency) not available. Install it with: gem install jeweler"
 end
 
-require 'spec/rake/spectask'
-Spec::Rake::SpecTask.new(:spec) do |spec|
-  spec.libs << 'lib' << 'spec'
-  spec.spec_files = FileList['spec/**/*_spec.rb']
-end
+require 'rspec/core/rake_task'
 
-Spec::Rake::SpecTask.new(:rcov) do |spec|
-  spec.libs << 'lib' << 'spec'
-  spec.pattern = 'spec/**/*_spec.rb'
+RSpec::Core::RakeTask.new('spec')
+
+RSpec::Core::RakeTask.new('rcov') do |spec|
   spec.rcov = true
+  spec.rcov_opts = %w[--exclude spec]
 end
-
-task :spec => :check_dependencies
 
 task :default => :spec
 
 begin
   require 'yard'