diff --git a/RAILS_VERSION b/RAILS_VERSION
index 30afce968e..b4e716a7c1 100644
--- a/RAILS_VERSION
+++ b/RAILS_VERSION
@@ -1 +1 @@
-3.1.0.beta
+3.1.0.beta1
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index 27eb6c2b9b..8cf3780fbc 100644
--- a/actionmailer/lib/action_mailer/version.rb
+++ b/actionmailer/lib/action_mailer/version.rb
@@ -3,7 +3,7 @@ module ActionMailer
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/actionpack/lib/action_pack/version.rb b/actionpack/lib/action_pack/version.rb
index 170ceb299a..584e5c3791 100644
--- a/actionpack/lib/action_pack/version.rb
+++ b/actionpack/lib/action_pack/version.rb
@@ -3,7 +3,7 @@ module ActionPack
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/activemodel/lib/active_model/version.rb b/activemodel/lib/active_model/version.rb
index 23ba42bf35..68c138da84 100644
--- a/activemodel/lib/active_model/version.rb
+++ b/activemodel/lib/active_model/version.rb
@@ -3,7 +3,7 @@ module ActiveModel
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/activerecord/lib/active_record/version.rb b/activerecord/lib/active_record/version.rb
index 0667be7d23..2c20dd997f 100644
--- a/activerecord/lib/active_record/version.rb
+++ b/activerecord/lib/active_record/version.rb
@@ -3,7 +3,7 @@ module ActiveRecord
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/activeresource/lib/active_resource/version.rb b/activeresource/lib/active_resource/version.rb
index 82dcb5d575..f26e2312b9 100644
--- a/activeresource/lib/active_resource/version.rb
+++ b/activeresource/lib/active_resource/version.rb
@@ -3,7 +3,7 @@ module ActiveResource
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/activesupport/lib/active_support/version.rb b/activesupport/lib/active_support/version.rb
index 690fc7f0fc..c2cf39e391 100644
--- a/activesupport/lib/active_support/version.rb
+++ b/activesupport/lib/active_support/version.rb
@@ -3,7 +3,7 @@ module ActiveSupport
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/railties/lib/rails/version.rb b/railties/lib/rails/version.rb
index b076881c21..fc6c0a0204 100644
--- a/railties/lib/rails/version.rb
+++ b/railties/lib/rails/version.rb
@@ -3,7 +3,7 @@ module Rails
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end
diff --git a/version.rb b/version.rb
index b076881c21..fc6c0a0204 100644
--- a/version.rb
+++ b/version.rb
@@ -3,7 +3,7 @@ module Rails
     MAJOR = 3
     MINOR = 1
     TINY  = 0
-    PRE   = "beta"
+    PRE   = "beta1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
   end