diff --git a/factory_bot_rails.gemspec b/factory_bot_rails.gemspec
index a34ac09..3d86fc6 100644
--- a/factory_bot_rails.gemspec
+++ b/factory_bot_rails.gemspec
@@ -10,7 +10,7 @@ Gem::Specification.new do |s|
     factory_bot and rails 3 or newer (currently just automatic factory definition
     loading)}
 
-  s.files         = Dir['**/*'].keep_if { |file| File.file?(file) }
+  s.files         = Dir['lib/**/*'] + %w[CONTRIBUTING.md LICENSE NEWS README.md]
   s.require_paths = ["lib"]
   s.executables   = []
   s.license       = "MIT"
diff --git a/factory_girl_rails.gemspec b/factory_girl_rails.gemspec
deleted file mode 100644
index 80710a4..0000000
--- a/factory_girl_rails.gemspec
+++ /dev/null
@@ -1,20 +0,0 @@
-Gem::Specification.new do |s|
-  s.name        = %q{factory_girl_rails}
-  s.version     = '4.8.2'
-  s.authors     = ["Joe Ferris"]
-  s.email       = %q{jferris@thoughtbot.com}
-  s.homepage    = "http://github.com/thoughtbot/factory_girl_rails"
-  s.summary     = %q{factory_girl_rails provides integration between
-    factory_girl and rails 3 or newer}
-  s.description = %q{factory_girl_rails provides integration between
-    factory_girl and rails 3 or newer (currently just automatic factory definition
-    loading)}
-
-  s.files         = Dir['**/*'].keep_if { |file| File.file?(file) }
-  s.require_paths = ["lib"]
-  s.executables   = []
-  s.license       = "MIT"
-
-  s.add_runtime_dependency('railties', '>= 3.0.0')
-  s.add_runtime_dependency('factory_girl', '~> 4.8.2')
-end