diff --git a/Gemfile.lock b/Gemfile.lock
index 8296a1ff4608a55c96871bec1d80537fcf1aa0c6..72f4a6f349f3ae303490a3cc4633c0e4dbf72f55 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,54 +14,54 @@ GIT
 PATH
   remote: .
   specs:
-    actionmailer (4.2.8.rc1)
-      actionpack (= 4.2.8.rc1)
-      actionview (= 4.2.8.rc1)
-      activejob (= 4.2.8.rc1)
+    actionmailer (4.2.8)
+      actionpack (= 4.2.8)
+      actionview (= 4.2.8)
+      activejob (= 4.2.8)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.8.rc1)
-      actionview (= 4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    actionpack (4.2.8)
+      actionview (= 4.2.8)
+      activesupport (= 4.2.8)
       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 (4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    actionview (4.2.8)
+      activesupport (= 4.2.8)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    activejob (4.2.8)
+      activesupport (= 4.2.8)
       globalid (>= 0.3.0)
-    activemodel (4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    activemodel (4.2.8)
+      activesupport (= 4.2.8)
       builder (~> 3.1)
-    activerecord (4.2.8.rc1)
-      activemodel (= 4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    activerecord (4.2.8)
+      activemodel (= 4.2.8)
+      activesupport (= 4.2.8)
       arel (~> 6.0)
-    activesupport (4.2.8.rc1)
+    activesupport (4.2.8)
       i18n (~> 0.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    rails (4.2.8.rc1)
-      actionmailer (= 4.2.8.rc1)
-      actionpack (= 4.2.8.rc1)
-      actionview (= 4.2.8.rc1)
-      activejob (= 4.2.8.rc1)
-      activemodel (= 4.2.8.rc1)
-      activerecord (= 4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    rails (4.2.8)
+      actionmailer (= 4.2.8)
+      actionpack (= 4.2.8)
+      actionview (= 4.2.8)
+      activejob (= 4.2.8)
+      activemodel (= 4.2.8)
+      activerecord (= 4.2.8)
+      activesupport (= 4.2.8)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.8.rc1)
+      railties (= 4.2.8)
       sprockets-rails
-    railties (4.2.8.rc1)
-      actionpack (= 4.2.8.rc1)
-      activesupport (= 4.2.8.rc1)
+    railties (4.2.8)
+      actionpack (= 4.2.8)
+      activesupport (= 4.2.8)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
 
@@ -294,4 +294,4 @@ DEPENDENCIES
   w3c_validators
 
 BUNDLED WITH
-   1.14.3
+   1.14.4
diff --git a/RAILS_VERSION b/RAILS_VERSION
index 84f835f7f67513503cf988375735bf76f7346359..ad9e446d8cf8b2d66aa3dc13905ed39492d91b57 100644
--- a/RAILS_VERSION
+++ b/RAILS_VERSION
@@ -1 +1 @@
-4.2.8.rc1
+4.2.8
diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
index 5bbcaa6097a6d023752e3bce558ceaae173cfb0d..f24982d787a7cb647ebcbc4c2fc8c1c674b77f91 100644
--- a/actionmailer/CHANGELOG.md
+++ b/actionmailer/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index acdd7aa6e34dc7a74384c6e0c211df0969bc4d19..8776550c98f20f8c4b7359b2d15be5f0de281209 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index f220d8612629cc50f183fd3fb9c667cc95319fd9..575914a5ed2ab3a15724ef4c5c96b9b1f7f761cd 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/actionpack/lib/action_pack/gem_version.rb b/actionpack/lib/action_pack/gem_version.rb
index 517b32aa8609af3350bada704b3800ed1d6a13ca..c781f7512c655625f0ba4d19bfcb0fc27f55d195 100644
--- a/actionpack/lib/action_pack/gem_version.rb
+++ b/actionpack/lib/action_pack/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index c92d4a504919a406c6d228111ab10767cfb6528a..9b71740924c31098bb53da9f7a73f5731ddbd29d 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/actionview/lib/action_view/gem_version.rb b/actionview/lib/action_view/gem_version.rb
index 78eba8ada1697225a36f0f06923a87bf2636eb4a..df586ca3be0e8c17931bf70cfa8bae87bad0e57a 100644
--- a/actionview/lib/action_view/gem_version.rb
+++ b/actionview/lib/action_view/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activejob/CHANGELOG.md b/activejob/CHANGELOG.md
index da1a2a14e5ed9d32849895a6009a70d85a20935d..3ba39c68e1c10e5244676c358fb98e18f01726ba 100644
--- a/activejob/CHANGELOG.md
+++ b/activejob/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/activejob/lib/active_job/gem_version.rb b/activejob/lib/active_job/gem_version.rb
index d201ffb6281f175c5151b164634fc635f29fe7e9..fc2cccb730bece830e8f12eec59321c93e231d7c 100644
--- a/activejob/lib/active_job/gem_version.rb
+++ b/activejob/lib/active_job/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
index d11c266af8efe02c6871107cd0b02174debf3822..02594590f231c7263108a3cca94a1611d18d60af 100644
--- a/activemodel/CHANGELOG.md
+++ b/activemodel/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/activemodel/lib/active_model/gem_version.rb b/activemodel/lib/active_model/gem_version.rb
index f65645a83be6b3b1380f0fb93abbc46611375027..a67b263c84c4bab2222847cf5c07364dc7c29823 100644
--- a/activemodel/lib/active_model/gem_version.rb
+++ b/activemodel/lib/active_model/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 986548b756f9c55afeff8a7468828ed9e54cdd12..1a013ede068e7cb035f4e7636da8c35effa2ac12 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   Using a mysql2 connection after it fails to reconnect will now have an error message
     saying the connection is closed rather than an undefined method error message.
diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb
index a28cb6069c93ddee601b0fde1705efd91fca8a72..e5b90858be007950a07fbbb52cd76cd9146fb49e 100644
--- a/activerecord/lib/active_record/gem_version.rb
+++ b/activerecord/lib/active_record/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 5b41a810d3ce81692277566721b123d2d3ce3f3e..8a2a874fdd7103ffa2e28bb38bde6d997b354e58 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   Make `getlocal` and `getutc` always return instances of `Time` for
     `ActiveSupport::TimeWithZone` and `DateTime`. This eliminates a possible
diff --git a/activesupport/lib/active_support/gem_version.rb b/activesupport/lib/active_support/gem_version.rb
index f6ed4e9056e9a5c3149da3607eebd0e906799a89..04d33b2e9e1251dcb6995253fa78e8d318ab6a36 100644
--- a/activesupport/lib/active_support/gem_version.rb
+++ b/activesupport/lib/active_support/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/guides/CHANGELOG.md b/guides/CHANGELOG.md
index 5ae7e1b5671d2e5a5d22ce5a61eca4d504db2fb0..59ae9fc798fd57b2274d2c38819f4d8a3bfb86e5 100644
--- a/guides/CHANGELOG.md
+++ b/guides/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   No changes.
 
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index 81db1f31e18facc56dc237f5b5f98e8dc7ed62fd..343606d24ca6151d2478ff29d7097446b8953198 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,4 +1,4 @@
-## Rails 4.2.8.rc1 (February 09, 2017) ##
+## Rails 4.2.8 (February 21, 2017) ##
 
 *   Add `config/initializers/to_time_preserves_timezone.rb`, which tells
     Active Support to preserve the receiver's timezone when calling `to_time`.
diff --git a/railties/lib/rails/gem_version.rb b/railties/lib/rails/gem_version.rb
index fd9c9b7688bf2398ffa95cbfcddb1450b4c50ec0..607a5debfbd30cdc4d67e9d900307bd37de74e10 100644
--- a/railties/lib/rails/gem_version.rb
+++ b/railties/lib/rails/gem_version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/version.rb b/version.rb
index fd9c9b7688bf2398ffa95cbfcddb1450b4c50ec0..607a5debfbd30cdc4d67e9d900307bd37de74e10 100644
--- a/version.rb
+++ b/version.rb
@@ -8,7 +8,7 @@ module VERSION
     MAJOR = 4
     MINOR = 2
     TINY  = 8
-    PRE   = "rc1"
+    PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end