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diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 17890b2668..fa2f2384f9 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,27 @@
+*   Deprecate custom `BigDecimal` serialization
+
+    Deprecate the custom `BigDecimal` serialization that is included when requiring
+    `active_support/all` as a fix for #12467. Let Ruby handle YAML serialization
+    for `BigDecimal` instead.
+
+    *David Celis*
+
+*   Fix parsing bugs in `XmlMini`
+
+    Symbols or boolean parsing would raise an error for non string values (e.g.
+    integers). Decimal parsing would fail due to a missing requirement.
+
+    *Birkir A. Barkarson*
+
+*   Maintain the current timezone when calling `wrap_with_time_zone`
+
+    Extend the solution from the fix for #12163 to the general case where `Time`
+    methods are wrapped with a time zone.
+
+    Fixes #12596.
+
+    *Andrew White*
+
 *   Remove behavior that automatically remove the Date/Time stubs, added by `travel`
     and `travel_to` methods, after each test case.