diff --git a/Rakefile b/Rakefile
index 47c0fb7..02ec64b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -38,3 +38,9 @@ end
 
 task :default => [ 'spec:platforms', 'jasmine:headless' ]
 
+desc "Build the runner"
+task :build do
+  Dir.chdir 'ext/jasmine-headless-specrunner' do
+    system %{ruby extconf.rb}
+  end
+end
diff --git a/jasmine-headless-webkit.gemspec b/jasmine-headless-webkit.gemspec
index dc2cb46..17aeb06 100644
--- a/jasmine-headless-webkit.gemspec
+++ b/jasmine-headless-webkit.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency 'jasmine', '~>1.1.beta'
+  s.add_dependency 'jasmine-core', '~>1.1.beta'
   s.add_dependency 'coffee-script', '>= 2.2'
   s.add_dependency 'rainbow'
   s.add_dependency 'multi_json'
diff --git a/lib/jasmine/files_list.rb b/lib/jasmine/files_list.rb
index 9f0c8d3..b1313f4 100644
--- a/lib/jasmine/files_list.rb
+++ b/lib/jasmine/files_list.rb
@@ -1,13 +1,4 @@
-begin
-  require 'jasmine'
-rescue NameError => e
-  if e.message['ActiveSupport::Concern']
-    $stderr.puts "[%s] %s (%s)" % [ "jasmine-gem".color(:red), e.message.color(:white), e.class.name.color(:yellow) ]
-    $stderr.puts "#{'Jasmine'.color(:red)} believes Rails 3 is available. Try using #{'Bundler'.color(:green)} and running via #{'bundle exec'.color(:green)}."
-  else
-    raise e
-  end
-end
+require 'jasmine-core'
 
 module Jasmine
   class FilesList
diff --git a/lib/jasmine/headless/runner.rb b/lib/jasmine/headless/runner.rb
index a9d48a0..4be91c9 100644
--- a/lib/jasmine/headless/runner.rb
+++ b/lib/jasmine/headless/runner.rb
@@ -3,7 +3,6 @@ require 'jasmine/headless/options'
 
 require 'fileutils'
 
-require 'jasmine/base'
 require 'coffee-script'
 require 'rainbow'