diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 85fff97a1..bff20e7df 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,7 +1,7 @@
 Changelog
 ---------
 
-3.20.0 (unreleased)
+3.20.0 (2023-07-20)
 *******************
 
 Features:
@@ -10,11 +10,15 @@ Features:
   Thanks :user:`sirosen` for the PR.
 - Use Abstract Base Classes to define ``FieldABC`` and ``SchemaABC``
   (:issue:`1449`). Thanks :user:`aditkumar72` for the PR.
+- Use `OrderedSet` as default `set_class`. Schemas are now ordered by default.
+  (:issue:`1744`)
 
 Bug fixes:
 
 - Handle ``OSError`` and ``OverflowError`` in ``utils.from_timestamp`` (:pr:`2102`).
   Thanks :user:`TheBigRoomXXL` for the PR.
+- Fix the default inheritance of nested partial schemas (:issue:`2149`).
+  Thanks :user:`matejsp` for reporting.
 
 Other changes:
 
diff --git a/src/marshmallow/__init__.py b/src/marshmallow/__init__.py
index 3ec24fe41..8a8b7654b 100644
--- a/src/marshmallow/__init__.py
+++ b/src/marshmallow/__init__.py
@@ -16,7 +16,7 @@
 
 from . import fields
 
-__version__ = "3.19.0"
+__version__ = "3.20.0"
 __parsed_version__ = Version(__version__)
 __version_info__: tuple[int, int, int] | tuple[
     int, int, int, str, int