diff --git a/crono.gemspec b/crono.gemspec
index 70260bd..43a5672 100644
--- a/crono.gemspec
+++ b/crono.gemspec
@@ -2,31 +2,31 @@
 require File.expand_path('../lib/crono/version', __FILE__)
 
 Gem::Specification.new do |s|
-  s.name        = "crono"
+  s.name        = 'crono'
   s.version     = Crono::VERSION
-  s.authors     = ["Dzmitry Plashchynski"]
-  s.email       = ["plashchynski@gmail.com"]
-  s.homepage    = "https://github.com/plashchynski/crono"
-  s.description = s.summary = "Job scheduler for Rails"
-  s.license     = "Apache-2.0"
+  s.authors     = ['Dzmitry Plashchynski']
+  s.email       = ['plashchynski@gmail.com']
+  s.homepage    = 'https://github.com/plashchynski/crono'
+  s.description = s.summary = 'Job scheduler for Rails'
+  s.license     = 'Apache-2.0'
 
-  s.required_rubygems_version = ">= 1.3.6"
-  s.rubyforge_project         = "crono"
+  s.required_rubygems_version = '>= 1.3.6'
+  s.rubyforge_project         = 'crono'
 
-  s.add_runtime_dependency      "activejob", "~> 4.0"
-  s.add_runtime_dependency      "activesupport", "~> 4.0"
-  s.add_runtime_dependency      "activerecord", "~> 4.0"
-  s.add_development_dependency  "rake", "~> 10.0"
-  s.add_development_dependency  "bundler", ">= 1.0.0"
-  s.add_development_dependency  "rspec", "~> 3.0"
-  s.add_development_dependency  "timecop", "~> 0.7"
-  s.add_development_dependency  "sqlite3"
-  s.add_development_dependency  "byebug"
-  s.add_development_dependency  "sinatra"
-  s.add_development_dependency  "haml"
-  s.add_development_dependency  "rack-test"
+  s.add_runtime_dependency 'activejob', '~> 4.0'
+  s.add_runtime_dependency 'activesupport', '~> 4.0'
+  s.add_runtime_dependency 'activerecord', '~> 4.0'
+  s.add_development_dependency 'rake', '~> 10.0'
+  s.add_development_dependency 'bundler', '>= 1.0.0'
+  s.add_development_dependency 'rspec', '~> 3.0'
+  s.add_development_dependency 'timecop', '~> 0.7'
+  s.add_development_dependency 'sqlite3'
+  s.add_development_dependency 'byebug'
+  s.add_development_dependency 'sinatra'
+  s.add_development_dependency 'haml'
+  s.add_development_dependency 'rack-test'
 
   s.files        = `git ls-files`.split("\n")
-  s.executables  = `git ls-files`.split("\n").map{|f| f =~ /^bin\/(.*)/ ? $1 : nil}.compact
+  s.executables  = ['crono']
   s.require_path = 'lib'
 end