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diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index c36df796a8..47f1c8458e 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,5 +1,24 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   `Date.beginning_of_week` thread local and `beginning_of_week` application config option added (default is Monday). *Innokenty Mikhailov*
+
+*   An optional block can be passed to `config_accessor` to set its default value
+
+        class User
+          include ActiveSupport::Configurable
+          config_accessor :hair_colors do
+            [:brown, :black, :blonde, :red]
+          end
+        end
+
+        User.hair_colors # => [:brown, :black, :blonde, :red]
+
+    *Larry Lv*
+
+*   ActiveSupport::Benchmarkable#silence has been deprecated due to its lack of
+    thread safety. It will be removed without replacement in Rails 4.1. *Steve
+    Klabnik*
+
 *   An optional block can be passed to `Hash#deep_merge`. The block will be invoked for each duplicated key
     and used to resolve the conflict. *Pranas Kiziela*