diff --git a/.document b/.document
deleted file mode 100644
index 3d618dd..0000000
--- a/.document
+++ /dev/null
@@ -1,5 +0,0 @@
-lib/**/*.rb
-bin/*
-- 
-features/**/*.feature
-LICENSE.txt
diff --git a/Gemfile b/Gemfile
index b362dae..4f1c217 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,15 +1,5 @@
 source "http://rubygems.org"
-# Add dependencies required to use your gem here.
-# Example:
-#   gem "activesupport", ">= 2.3.5"
 
-# Add dependencies to develop your gem here.
-# Include everything needed to run rake, tests, features, etc.
-gem "ffi"
+gemspec
 
-group :development do
-  gem "shoulda", ">= 0"
-  gem "bundler", "~> 1.0.0"
-  gem "jeweler", "~> 1.6.4"
-  gem "rcov", ">= 0"
-end
+gem "rake", "~> 12.0", group: :development
diff --git a/Rakefile b/Rakefile
index 4002b4a..841702e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,53 +1,12 @@
 # encoding: utf-8
 
-require 'rubygems'
-require 'bundler'
-begin
-  Bundler.setup(:default, :development)
-rescue Bundler::BundlerError => e
-  $stderr.puts e.message
-  $stderr.puts "Run `bundle install` to install missing gems"
-  exit e.status_code
-end
-require 'rake'
-
-require 'jeweler'
-Jeweler::Tasks.new do |gem|
-  # gem is a Gem::Specification... see http://docs.rubygems.org/read/chapter/20 for more options
-  gem.name = "ffi-portaudio"
-  gem.homepage = "http://github.com/nanki/ffi-portaudio"
-  gem.license = "MIT"
-  gem.summary = %Q{Ruby bindings for PortAudio.}
-  gem.description = %Q{Ruby bindings for PortAudio.}
-  gem.email = "nanki@dotswitch.net"
-  gem.authors = ["nanki"]
-  # dependencies defined in Gemfile
-end
-Jeweler::RubygemsDotOrgTasks.new
-
+require "bundler/gem_tasks"
 require 'rake/testtask'
+
 Rake::TestTask.new(:test) do |test|
   test.libs << 'lib' << 'test'
   test.pattern = 'test/**/test_*.rb'
   test.verbose = true
 end
 
-require 'rcov/rcovtask'
-Rcov::RcovTask.new do |test|
-  test.libs << 'test'
-  test.pattern = 'test/**/test_*.rb'
-  test.verbose = true
-  test.rcov_opts << '--exclude "gems/*"'
-end
-
 task :default => :test
-
-require 'rake/rdoctask'
-Rake::RDocTask.new do |rdoc|
-  version = File.exist?('VERSION') ? File.read('VERSION') : ""
-
-  rdoc.rdoc_dir = 'rdoc'
-  rdoc.title = "ffi-portaudio #{version}"
-  rdoc.rdoc_files.include('README*')
-  rdoc.rdoc_files.include('lib/**/*.rb')
-end
diff --git a/VERSION b/VERSION
deleted file mode 100644
index d917d3e..0000000
--- a/VERSION
+++ /dev/null
@@ -1 +0,0 @@
-0.1.2
diff --git a/ffi-portaudio.gemspec b/ffi-portaudio.gemspec
index 6e1d21e..a995815 100644
--- a/ffi-portaudio.gemspec
+++ b/ffi-portaudio.gemspec
@@ -1,15 +1,10 @@
-# Generated by jeweler
-# DO NOT EDIT THIS FILE DIRECTLY
-# Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
-# -*- encoding: utf-8 -*-
-
+require './lib/ffi-portaudio/version'
 Gem::Specification.new do |s|
   s.name = "ffi-portaudio"
-  s.version = "0.1.2"
+  s.version = FFI::PortAudio::VERSION
 
-  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["nanki"]
-  s.date = "2012-05-08"
+  s.summary = "Ruby bindings for PortAudio."
   s.description = "Ruby bindings for PortAudio."
   s.email = "nanki@dotswitch.net"
   s.extra_rdoc_files = [
@@ -17,12 +12,10 @@ Gem::Specification.new do |s|
     "README.rdoc"
   ]
   s.files = [
-    ".document",
     "Gemfile",
     "LICENSE.txt",
     "README.rdoc",
     "Rakefile",
-    "VERSION",
     "examples/spectrum.rb",
     "ffi-portaudio.gemspec",
     "lib/ffi-portaudio.rb",
@@ -31,37 +24,11 @@ Gem::Specification.new do |s|
     "lib/ffi-portaudio/enum.rb",
     "lib/ffi-portaudio/stream.rb",
     "lib/ffi-portaudio/struct.rb",
-    "test/helper.rb",
-    "test/test_ffi-portaudio.rb"
+    "lib/ffi-portaudio/version.rb",
   ]
   s.homepage = "http://github.com/nanki/ffi-portaudio"
-  s.licenses = ["MIT"]
+  s.license = "MIT"
   s.require_paths = ["lib"]
-  s.rubygems_version = "1.8.11"
-  s.summary = "Ruby bindings for PortAudio."
-
-  if s.respond_to? :specification_version then
-    s.specification_version = 3
-
-    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
-      s.add_runtime_dependency(%q<ffi>, [">= 0"])
-      s.add_development_dependency(%q<shoulda>, [">= 0"])
-      s.add_development_dependency(%q<bundler>, ["~> 1.0.0"])
-      s.add_development_dependency(%q<jeweler>, ["~> 1.6.4"])
-      s.add_development_dependency(%q<rcov>, [">= 0"])
-    else
-      s.add_dependency(%q<ffi>, [">= 0"])
-      s.add_dependency(%q<shoulda>, [">= 0"])
-      s.add_dependency(%q<bundler>, ["~> 1.0.0"])
-      s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
-      s.add_dependency(%q<rcov>, [">= 0"])
-    end
-  else
-    s.add_dependency(%q<ffi>, [">= 0"])
-    s.add_dependency(%q<shoulda>, [">= 0"])
-    s.add_dependency(%q<bundler>, ["~> 1.0.0"])
-    s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
-    s.add_dependency(%q<rcov>, [">= 0"])
-  end
+  s.add_dependency "ffi"
 end
 
diff --git a/lib/ffi-portaudio.rb b/lib/ffi-portaudio.rb
index 551a317..145cf8d 100644
--- a/lib/ffi-portaudio.rb
+++ b/lib/ffi-portaudio.rb
@@ -1,8 +1,7 @@
 require 'ffi'
 
 module FFI::PortAudio
-  VERSION ||= File.read(File.join(File.dirname(__FILE__), '../VERSION')).strip
-
+  require 'ffi-portaudio/version'
   require 'ffi-portaudio/enum'
   require 'ffi-portaudio/struct'
   require 'ffi-portaudio/const'
diff --git a/lib/ffi-portaudio/version.rb b/lib/ffi-portaudio/version.rb
new file mode 100644
index 0000000..c0c6adc
--- /dev/null
+++ b/lib/ffi-portaudio/version.rb
@@ -0,0 +1,5 @@
+module FFI
+  module PortAudio
+    VERSION = "0.1.3"
+  end
+end
diff --git a/test/helper.rb b/test/helper.rb
deleted file mode 100644
index 81461a5..0000000
--- a/test/helper.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-require 'rubygems'
-require 'bundler'
-begin
-  Bundler.setup(:default, :development)
-rescue Bundler::BundlerError => e
-  $stderr.puts e.message
-  $stderr.puts "Run `bundle install` to install missing gems"
-  exit e.status_code
-end
-require 'test/unit'
-require 'shoulda'
-
-$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
-$LOAD_PATH.unshift(File.dirname(__FILE__))
-require 'ffi-portaudio'
-
-class Test::Unit::TestCase
-end
diff --git a/test/test_ffi-portaudio.rb b/test/test_ffi-portaudio.rb
deleted file mode 100644
index 778e6dd..0000000
--- a/test/test_ffi-portaudio.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-require 'helper'
-
-class TestFfiPortaudio < Test::Unit::TestCase
-  should "probably rename this file and start testing for real" do
-    flunk "hey buddy, you should probably rename this file and start testing for real"
-  end
-end