diff --git a/RAILS_VERSION b/RAILS_VERSION
index ee00187eb3410..59e61f95df967 100644
--- a/RAILS_VERSION
+++ b/RAILS_VERSION
@@ -1 +1 @@
-4.1.0.beta2
+4.2.0.alpha
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index 60732c593b155..7b2cf305c2f7d 100644
--- a/actionmailer/lib/action_mailer/version.rb
+++ b/actionmailer/lib/action_mailer/version.rb
@@ -1,7 +1,7 @@
 module ActionMailer
   # Returns the version of the currently loaded ActionMailer as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/actionpack/lib/action_pack/version.rb b/actionpack/lib/action_pack/version.rb
index 8da3069c8bfc8..75fb0d9532499 100644
--- a/actionpack/lib/action_pack/version.rb
+++ b/actionpack/lib/action_pack/version.rb
@@ -1,7 +1,7 @@
 module ActionPack
   # Returns the version of the currently loaded ActionPack as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/actionview/lib/action_view/version.rb b/actionview/lib/action_view/version.rb
index 3d5d6c9be1e51..b3ff4157752f3 100644
--- a/actionview/lib/action_view/version.rb
+++ b/actionview/lib/action_view/version.rb
@@ -1,7 +1,7 @@
 module ActionView
   # Returns the version of the currently loaded ActionView as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/activemodel/lib/active_model/version.rb b/activemodel/lib/active_model/version.rb
index f7c9534ffbce3..5c9d2bc6bce36 100644
--- a/activemodel/lib/active_model/version.rb
+++ b/activemodel/lib/active_model/version.rb
@@ -1,7 +1,7 @@
 module ActiveModel
   # Returns the version of the currently loaded ActiveModel as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/activerecord/lib/active_record/version.rb b/activerecord/lib/active_record/version.rb
index 7795561e5163f..5eb7f7e205b4d 100644
--- a/activerecord/lib/active_record/version.rb
+++ b/activerecord/lib/active_record/version.rb
@@ -1,7 +1,7 @@
 module ActiveRecord
   # Returns the version of the currently loaded ActiveRecord as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/activesupport/lib/active_support/version.rb b/activesupport/lib/active_support/version.rb
index b9d6417b07cd6..38f726ea34661 100644
--- a/activesupport/lib/active_support/version.rb
+++ b/activesupport/lib/active_support/version.rb
@@ -1,7 +1,7 @@
 module ActiveSupport
   # Returns the version of the currently loaded ActiveSupport as a Gem::Version
   def self.version
-    Gem::Version.new "4.1.0.beta2"
+    Gem::Version.new "4.2.0.alpha"
   end
 
   module VERSION #:nodoc:
diff --git a/railties/lib/rails/version.rb b/railties/lib/rails/version.rb
index e4fd798d18c4a..79313c936aca9 100644
--- a/railties/lib/rails/version.rb
+++ b/railties/lib/rails/version.rb
@@ -1,9 +1,9 @@
 module Rails
   module VERSION
     MAJOR = 4
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
-    PRE   = "beta2"
+    PRE   = "alpha"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/version.rb b/version.rb
index e4fd798d18c4a..79313c936aca9 100644
--- a/version.rb
+++ b/version.rb
@@ -1,9 +1,9 @@
 module Rails
   module VERSION
     MAJOR = 4
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
-    PRE   = "beta2"
+    PRE   = "alpha"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end