diff --git a/RAILS_VERSION b/RAILS_VERSION
index 14e1b44259618d6a7bb9801710ecbcc36ec19762..0db186f5d2e43e1d0de42be3764b5afac9f655b2 100644
--- a/RAILS_VERSION
+++ b/RAILS_VERSION
@@ -1 +1 @@
-4.0.0.beta1
+4.0.0.rc1
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index 89e31c4be6a36a388cfc40fe21227b36a86ea565..ab67f629299b51e27063cd862455906160681fa1 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 "4.0.0.beta1"
+    Gem::Version.new "4.0.0.rc1"
   end
 
   module VERSION #:nodoc:
diff --git a/actionpack/lib/action_pack/version.rb b/actionpack/lib/action_pack/version.rb
index b5e47d78d17d7a18352a6b89ea9b8c32d5f81422..b16dbd4f15975b338caf5f77f9b19621cd3aef85 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 "4.0.0.beta1"
+    Gem::Version.new "4.0.0.rc1"
   end
 
   module VERSION #:nodoc:
diff --git a/activemodel/lib/active_model/version.rb b/activemodel/lib/active_model/version.rb
index 35c4b309992aae92fb2c0d66e58276cc15924eba..b0afb7513d9caa271bc0746ec6afc1752c9a2a35 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 "4.0.0.beta1"
+    Gem::Version.new "4.0.0.rc1"
   end
 
   module VERSION #:nodoc:
diff --git a/activerecord/lib/active_record/version.rb b/activerecord/lib/active_record/version.rb
index f2b041ad97ed58f9dcefbb2c5077546b2be0f89e..a670e18aeeac88f18ed49430d7b270cb2e7ae0f1 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 "4.0.0.beta1"
+    Gem::Version.new "4.0.0.rc1"
   end
 
   module VERSION #:nodoc:
diff --git a/activesupport/lib/active_support/version.rb b/activesupport/lib/active_support/version.rb
index ca230571892fbb5dabf799df3e53a3322d55e975..2dc040d9a8ef7f6d8a82b92a6e6b45b081435642 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 "4.0.0.beta1"
+    Gem::Version.new "4.0.0.rc1"
   end
 
   module VERSION #:nodoc:
diff --git a/railties/lib/rails/version.rb b/railties/lib/rails/version.rb
index fee352db5aa33d08878bc86f3996663c775df195..dcbf57a4dfebb9ed5528957f6d3ec9666fa8b611 100644
--- a/railties/lib/rails/version.rb
+++ b/railties/lib/rails/version.rb
@@ -3,7 +3,7 @@ module VERSION
     MAJOR = 4
     MINOR = 0
     TINY  = 0
-    PRE   = "beta1"
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/version.rb b/version.rb
index fee352db5aa33d08878bc86f3996663c775df195..dcbf57a4dfebb9ed5528957f6d3ec9666fa8b611 100644
--- a/version.rb
+++ b/version.rb
@@ -3,7 +3,7 @@ module VERSION
     MAJOR = 4
     MINOR = 0
     TINY  = 0
-    PRE   = "beta1"
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end