diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..ef1980d730542d1e428d8a4af844bfcdc59051bb
--- /dev/null
+++ b/actionmailer/actionmailer.gemspec
@@ -0,0 +1,14 @@
+Gem::Specification.new do |s|
+  s.name = 'actionmailer'
+  s.version = '2.3.15'
+  s.summary = 'Service layer for easy email delivery and testing.'
+  s.description = 'Makes it trivial to test and deliver emails sent from a single service layer.'
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+
+  s.add_dependency 'actionpack', '= 2.3.15'
+end
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..36369f4d7951debc0c220df1d44f1d6ae4f5a87e
--- /dev/null
+++ b/actionpack/actionpack.gemspec
@@ -0,0 +1,15 @@
+Gem::Specification.new do |s|
+  s.name = 'actionpack'
+  s.version = '2.3.15'
+  s.summary = 'Web-flow and rendering framework putting the VC in MVC.'
+  s.description = 'Eases web-request routing, handling, and response as a half-way front, half-way page controller. Implemented with specific emphasis on enabling easy unit/integration testing that doesn\'t require a browser.'
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+
+  s.add_dependency 'activesupport', '= 2.3.15'
+  s.add_dependency 'rack', '~> 1.1.0'
+end
diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..94ea63db32cf1d4d463bc2cb84b9b2ce06456eac
--- /dev/null
+++ b/activerecord/activerecord.gemspec
@@ -0,0 +1,17 @@
+Gem::Specification.new do |s|
+  s.name = 'activerecord'
+  s.version = '2.3.15'
+  s.summary = 'Implements the ActiveRecord pattern for ORM.'
+  s.description = 'Implements the ActiveRecord pattern (Fowler, PoEAA) for ORM. It ties database tables and classes together for business objects, like Customer or Subscription, that can find, save, and destroy themselves without resorting to manual SQL.'
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+  s.files = ['README']
+  s.rdoc_options = ['--main', 'README']
+  s.extra_rdoc_files = ['README']
+
+  s.add_dependency 'activesupport', '= 2.3.15'
+end
diff --git a/activeresource/activeresource.gemspec b/activeresource/activeresource.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..16027300f6a6f42e88cabe0d9afbfc35996635eb
--- /dev/null
+++ b/activeresource/activeresource.gemspec
@@ -0,0 +1,17 @@
+Gem::Specification.new do |s|
+  s.name = 'activeresource'
+  s.version = '2.3.15'
+  s.summary = 'Think Active Record for web resources.'
+  s.description = 'Wraps web resources in model classes that can be manipulated through XML over REST.'
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+  s.files = ['README']
+  s.rdoc_options = ['--main', 'README']
+  s.extra_rdoc_files = ['README']
+
+  s.add_dependency 'activesupport', '= 2.3.15'
+end
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..b7bbcdaa5a6cf403ea104148690c0ddb7f508066
--- /dev/null
+++ b/activesupport/activesupport.gemspec
@@ -0,0 +1,12 @@
+Gem::Specification.new do |s|
+  s.name = 'activesupport'
+  s.version = '2.3.15'
+  s.summary = 'Support and utility classes used by the Rails framework.'
+  s.description = 'Utility library which carries commonly used classes and goodies from the Rails framework'
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+end
diff --git a/railties/railties.gemspec b/railties/railties.gemspec
new file mode 100644
index 0000000000000000000000000000000000000000..b70741de4ed1ed77b69af60c2359499cdcbf0bb0
--- /dev/null
+++ b/railties/railties.gemspec
@@ -0,0 +1,22 @@
+Gem::Specification.new do |s|
+  s.name = 'rails'
+  s.version = '2.3.15'
+  s.summary = 'Web-application framework with template engine, control-flow layer, and ORM.'
+  s.description = "Rails is a framework for building web-application using CGI, FCGI, mod_ruby, or WEBrick\non top of either MySQL, PostgreSQL, SQLite, DB2, SQL Server, or Oracle with eRuby- or Builder-based templates."
+
+  s.author = 'David Heinemeier Hansson'
+  s.email = 'david@loudthinking.com'
+  s.homepage = 'http://www.rubyonrails.org'
+
+  s.require_path = 'lib'
+  s.files = ['bin/rails']
+  s.executables = ['rails']
+  s.rdoc_options = ['--exclude', '.']
+
+  s.add_dependency 'rake',           '>= 0.8.3'
+  s.add_dependency 'activesupport',  '= 2.3.15'
+  s.add_dependency 'activerecord',   '= 2.3.15'
+  s.add_dependency 'actionpack',     '= 2.3.15'
+  s.add_dependency 'actionmailer',   '= 2.3.15'
+  s.add_dependency 'activeresource', '= 2.3.15'
+end