diff --git a/periodicity.gemspec b/periodicity.gemspec
index 677bf7e..bf67b3b 100644
--- a/periodicity.gemspec
+++ b/periodicity.gemspec
@@ -1,14 +1,22 @@
 # -*- encoding: utf-8 -*-
 require File.expand_path('../lib/periodicity/version', __FILE__)
 
-Gem::Specification.new do |gem|
-  gem.name        = 'periodicity'
-  gem.version     = Periodicity::VERSION
+Gem::Specification.new do |s|
+  s.name        = "periodicity"
+  s.version     = Periodicity::VERSION
+  s.authors     = ["Dzmitry Plashchynski"]
+  s.email       = ["plashchynski@gmail.com"]
+  s.homepage    = "https://github.com/plashchynski/periodicity"
   gem.description = gem.summary = "Job scheduler for Rails"
-  gem.authors     = ["Dzmitry Plashchynski"]
-  gem.email       = "plashchynski@gmail.com"
-  gem.files       = `git ls-files`.split("\n")
-  gem.require_paths = ["lib"]
-  gem.homepage    = "https://github.com/plashchynski/periodicity"
-  gem.license     = "Apache-2.0"
+
+  s.required_rubygems_version = ">= 1.3.6"
+  s.rubyforge_project         = "periodicity"
+
+  s.add_runtime_dependency      "activejob"
+  s.add_development_dependency  "bundler", ">= 1.0.0"
+  s.add_development_dependency  "rspec"
+
+  s.files        = `git ls-files`.split("\n")
+  s.executables  = `git ls-files`.split("\n").map{|f| f =~ /^bin\/(.*)/ ? $1 : nil}.compact
+  s.require_path = 'lib'
 end