diff --git a/actioncable/CHANGELOG.md b/actioncable/CHANGELOG.md
index df7937b27a7baa7c87476bf39c1f37fc3256f591..64aea88588f6653bd5470d427da72a8592cc52c5 100644
--- a/actioncable/CHANGELOG.md
+++ b/actioncable/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Added to Rails!
 
     *DHH*
\ No newline at end of file
diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
index 0ecb0235bce3e1213a8ec3578ece1d5656069910..73ce989a5ac678d4f8261a7b41c1e61b3acfea86 100644
--- a/actionmailer/CHANGELOG.md
+++ b/actionmailer/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   `config.force_ssl = true` will set
     `config.action_mailer.default_url_options = { protocol: 'https' }`
 
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 8b2943af74c6b4d3af888e30e65c5db42367d4f9..3314a0b77d958e55803bcadfc895c81849b6873e 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Deprecate `redirect_to :back` in favor of `redirect_back`, which accepts a
     required `fallback_location` argument, thus eliminating the possibility of a
     `RedirectBackError`.
diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index dc9ec974bb31e46ef2e1eff34cb057c8dfa6fef4..a397ac4417db2afb6e1faf63a38b1f9761c3f981 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   `I18n.translate` helper will wrap the missing translation keys
      in a <span> tag only if `debug_missing_translation` configuration
      be true. Default value is `true`. For example in `application.rb`:
diff --git a/activejob/CHANGELOG.md b/activejob/CHANGELOG.md
index 79235019fef07fbc5d5ef311f902302125e1a120..2caa073f683ffeef991e1171edacb2f43999193d 100644
--- a/activejob/CHANGELOG.md
+++ b/activejob/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Fixed serializing `:at` option for `assert_enqueued_with`
     and `assert_performed_with`.
 
diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
index a3368cd197a12368d5eb38b242ea75d75e608785..3d722488e2e52a0e10f2ec7b39c35aaf07aca4b5 100644
--- a/activemodel/CHANGELOG.md
+++ b/activemodel/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Validate multiple contexts on `valid?` and `invalid?` at once.
 
     Example:
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index dc5d2632dcdb9bb22d7db9ab895a30f49b534b6a..dbf19c01da7844206438c8e8627155df2c913892 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Order the result of `find(ids)` to match the passed array, if the relation
     has no explicit order defined.
 
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 70d671cd2dd2d7e35f35c219b4ab51338dfb3423..2656d3f1132fa1b89a29050ff1399ec76b0938f3 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Add thread_m/cattr_accessor/reader/writer suite of methods for declaring class and module variables that live per-thread.
     This makes it easy to declare per-thread globals that are encapsulated. Note: This is a sharp edge. A wild proliferation
     of globals is A Bad Thing. But like other sharp tools, when it's right, it's right.
diff --git a/guides/CHANGELOG.md b/guides/CHANGELOG.md
index 09fb7b1a0e62c855a2ec2d234745d364d28d381e..16919784ad1adcd723a13855e266d1b0539056b9 100644
--- a/guides/CHANGELOG.md
+++ b/guides/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Add code of conduct to contributing guide
 
     *Jon Moss*
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index bf4eae39b9b6be75654d01ec89ebc231fa7fc14c..d9d0136ad8b89092660e6a287268bc9271aa9186 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 5.0.0.beta1 (December 18, 2015) ##
+
+*   No changes.
+
+
 *   Newly generated plugins get a `README.md` in Markdown.
 
     *Yuji Yaginuma*