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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 6c129a1c79..904ac5c26a 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,39 @@
+*   Fixed a bug where uniqueness validations would error on out of range values,
+    even if an validation should have prevented it from hitting the database.
+
+    *Andrey Voronkov*
+
+*   MySQL: `:charset` and `:collation` support for string and text columns.
+
+    Example:
+
+        create_table :foos do |t|
+          t.string :string_utf8_bin, charset: 'utf8', collation: 'utf8_bin'
+          t.text   :text_ascii,      charset: 'ascii'
+        end
+
+    *Ryuta Kamizono*
+
+*   Foreign key related methods in the migration DSL respect
+    `ActiveRecord::Base.pluralize_table_names = false`.
+
+    Fixes #19643.
+
+    *Mehmet Emin İNAÇ*
+
+*   Reduce memory usage from loading types on pg.
+
+    Fixes #19578.
+
+    *Sean Griffin*
+
+*   Add `config.active_record.warn_on_records_fetched_greater_than` option
+
+    When set to an integer, a warning will be logged whenever a result set
+    larger than the specified size is returned by a query. Fixes #16463
+
+    *Jason Nochlin*
+
 *   Ignore psqlrc when loading database structure.
 
     *Jason Weathered*