diff --git a/Gemfile.lock b/Gemfile.lock
index b95f2ab595e3b7d18102610176eb0ce6ba166311..ade59fe9ffdf6423739086663fee9c7777e030ab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,55 +14,55 @@ GIT
 PATH
   remote: .
   specs:
-    actionmailer (4.2.6)
-      actionpack (= 4.2.6)
-      actionview (= 4.2.6)
-      activejob (= 4.2.6)
+    actionmailer (4.2.7.rc1)
+      actionpack (= 4.2.7.rc1)
+      actionview (= 4.2.7.rc1)
+      activejob (= 4.2.7.rc1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.6)
-      actionview (= 4.2.6)
-      activesupport (= 4.2.6)
+    actionpack (4.2.7.rc1)
+      actionview (= 4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       rack (~> 1.6)
       rack-test (~> 0.6.2)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.6)
-      activesupport (= 4.2.6)
+    actionview (4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (4.2.6)
-      activesupport (= 4.2.6)
+    activejob (4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       globalid (>= 0.3.0)
-    activemodel (4.2.6)
-      activesupport (= 4.2.6)
+    activemodel (4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       builder (~> 3.1)
-    activerecord (4.2.6)
-      activemodel (= 4.2.6)
-      activesupport (= 4.2.6)
+    activerecord (4.2.7.rc1)
+      activemodel (= 4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       arel (~> 6.0)
-    activesupport (4.2.6)
+    activesupport (4.2.7.rc1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    rails (4.2.6)
-      actionmailer (= 4.2.6)
-      actionpack (= 4.2.6)
-      actionview (= 4.2.6)
-      activejob (= 4.2.6)
-      activemodel (= 4.2.6)
-      activerecord (= 4.2.6)
-      activesupport (= 4.2.6)
+    rails (4.2.7.rc1)
+      actionmailer (= 4.2.7.rc1)
+      actionpack (= 4.2.7.rc1)
+      actionview (= 4.2.7.rc1)
+      activejob (= 4.2.7.rc1)
+      activemodel (= 4.2.7.rc1)
+      activerecord (= 4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.6)
+      railties (= 4.2.7.rc1)
       sprockets-rails
-    railties (4.2.6)
-      actionpack (= 4.2.6)
-      activesupport (= 4.2.6)
+    railties (4.2.7.rc1)
+      actionpack (= 4.2.7.rc1)
+      activesupport (= 4.2.7.rc1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
 
@@ -214,7 +214,7 @@ GEM
       thread
     sprockets (3.0.3)
       rack (~> 1.0)
-    sprockets-rails (3.0.4)
+    sprockets-rails (3.1.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
diff --git a/RAILS_VERSION b/RAILS_VERSION
index d6f85abf68d9621464e0388d087c8c66fa6894b0..96a45955d8d53f9e5fb19a54ba3b5d427b1d2127 100644
--- a/RAILS_VERSION
+++ b/RAILS_VERSION
@@ -1 +1 @@
-4.2.6
+4.2.7.rc1
diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
index 692aac02400db1ea9299024407b702bb98a55820..f55357861fac10a6ee9db79ff28de88ebb9fed15 100644
--- a/actionmailer/CHANGELOG.md
+++ b/actionmailer/CHANGELOG.md
@@ -1,3 +1,5 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
 *   Removes `-t` from default Sendmail arguments to match the underlying
     `Mail::Sendmail` setting.
 
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index 16c36b6abdd0ccb49085264990736de88520bbe9..31b5800eb9136229628b1aeb6539d3bd691f3f6c 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index ea84d5b0d49b072cfe6002f1c23dcbe8f98ae26f..174d37a00dcc172ce1fcffb10d43917a1cf4d7a9 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   No changes.
diff --git a/actionpack/lib/action_pack/gem_version.rb b/actionpack/lib/action_pack/gem_version.rb
index 15b7e6e6b7969f5345f32617c16949fd1b98cf57..09c305e7a72e80235dcb9dd3616118dbdc2b2e29 100644
--- a/actionpack/lib/action_pack/gem_version.rb
+++ b/actionpack/lib/action_pack/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index f3022cde295cebe661884f3321364fe0e3d5075a..e9ec3f2e0e065bb7ffc309049b4bc978a02fc528 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   Fix stripping the digest from the automatically generated img tag alt
diff --git a/actionview/lib/action_view/gem_version.rb b/actionview/lib/action_view/gem_version.rb
index 4b81d0cd890f5002a3254a8d9903ec23b6c86726..56200153a9befb184fbba056434cbb8c67a88631 100644
--- a/actionview/lib/action_view/gem_version.rb
+++ b/actionview/lib/action_view/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activejob/CHANGELOG.md b/activejob/CHANGELOG.md
index 97a061c464c1afe1c599acfc382f642b943284ca..9646e2433f25716513fc7e8d266eca01cd19e88c 100644
--- a/activejob/CHANGELOG.md
+++ b/activejob/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   No changes.
diff --git a/activejob/lib/active_job/gem_version.rb b/activejob/lib/active_job/gem_version.rb
index e70cfa7265621c3231c1fc4a9b8e4e64fbde0ebc..b46e92d26d843ff2b2aa75130fbf5cacda6afecd 100644
--- a/activejob/lib/active_job/gem_version.rb
+++ b/activejob/lib/active_job/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
index 89c10abe8e6978ebf2c04d758bf2aa2ec7ad0ae5..26ac7ead49011840327c2502ab706f60ca2c5398 100644
--- a/activemodel/CHANGELOG.md
+++ b/activemodel/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   No changes.
diff --git a/activemodel/lib/active_model/gem_version.rb b/activemodel/lib/active_model/gem_version.rb
index 8f506c464b50d7f0af1c2a271dc179889048cf66..8c58722384658bc236375a6242ca208352ef9060 100644
--- a/activemodel/lib/active_model/gem_version.rb
+++ b/activemodel/lib/active_model/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index e6b5bb356fb5536d74390bc7750f43d279f5cfeb..6bac5e459a6c6a3d776b9581fc19f406db63b5cc 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,5 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
 *   Inspecting an object with an associated array of over 10 elements no longer
     truncates the array, preventing `inspect` from looping infinitely in some
     cases.
diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb
index 222b420d37b1a8fee3cb84b3cecbaa828afba540..e40a3d061e8102da1fa41d9e795d87debceab2b0 100644
--- a/activerecord/lib/active_record/gem_version.rb
+++ b/activerecord/lib/active_record/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 611f85c5d914236e27f9ed85cf7f71219e732b8d..664b45295ad37376f55b6b13023e46d28a38e65f 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,5 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
 *   Fixed `ActiveSupport::Logger.broadcast` so that calls to `#silence` now
     properly delegate to all loggers. Silencing now properly suppresses logging
     to both the log and the console.
diff --git a/activesupport/lib/active_support/gem_version.rb b/activesupport/lib/active_support/gem_version.rb
index 466b3deea748ab967476da32d72d8029884d7e63..c34f73a723cd99c9000d8ec6a3434995cb98a24d 100644
--- a/activesupport/lib/active_support/gem_version.rb
+++ b/activesupport/lib/active_support/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/guides/CHANGELOG.md b/guides/CHANGELOG.md
index 0cebdfb5ea1cea89d883e69888fba8a563126583..2ff49d73e5faed3bae5117f1d4b0f6e2ccd9311d 100644
--- a/guides/CHANGELOG.md
+++ b/guides/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   No changes.
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index f720819d5afd28a3993542f38d5bdf1f3f1cf8c9..e80012374ac969d03ccd4d99d62565c21d49f81a 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 4.2.7.rc1 (June 30, 2016) ##
+
+*   No changes.
+
+
 ## Rails 4.2.6 (March 07, 2016) ##
 
 *   No changes.
diff --git a/railties/lib/rails/gem_version.rb b/railties/lib/rails/gem_version.rb
index c999e545593617c5891fcef6830492f44da9dd1d..05e8d8924f6b611a3a36155a875b31fe66caf37e 100644
--- a/railties/lib/rails/gem_version.rb
+++ b/railties/lib/rails/gem_version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/version.rb b/version.rb
index c999e545593617c5891fcef6830492f44da9dd1d..05e8d8924f6b611a3a36155a875b31fe66caf37e 100644
--- a/version.rb
+++ b/version.rb
@@ -7,8 +7,8 @@ def self.gem_version
   module VERSION
     MAJOR = 4
     MINOR = 2
-    TINY  = 6
-    PRE   = nil
+    TINY  = 7
+    PRE   = "rc1"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end