Updates Changelog

Changelog

@@ -8,6 +8,52 @@ This document contains change notes for bugfix releases in
 the 4.0.x series (latentcall), please see :ref:`whatsnew-4.0` for
 an overview of what's new in Celery 4.0.
 
+.. _version-4.0.2:
+
+4.0.2
+=====
+:release-date: 2016-12-15 03:40 PM PST
+:release-by: Ask Solem
+
+- **Requirements**
+
+    - Now depends on :ref:`Kombu 4.0.2 <kombu:version-4.0.2>`.
+
+- **Tasks**: Fixed problem with JSON serialization of `group` (``keys must be
+    string`` error, Issue #3688).
+
+- **Worker**: Fixed JSON serialization issue when using ``inspect active``
+  and friends (Issue #3667).
+
+- **App**: Fixed saferef errors when using signals (Issue #3670).
+
+- **Prefork**: Fixed bug with pack requiring bytes argument
+  on Python 2.7.5 and earlier (Issue #3674).
+
+- **Tasks**: Saferepr did not handle unicode in bytestrings on Python 2
+  (Issue #3676).
+
+- **Testing**: Added new ``celery_worker_paremeters`` fixture.
+
+    Contributed by **Michael Howitz**.
+
+- **Tasks**: Added new ``app`` argument to ``GroupResult.restore``
+  (Issue #3669).
+
+    This makes the restore method behave the same way as the ``GroupResult``
+    constructor.
+
+    Contributed by **Andreas Pelme**.
+
+- **Tasks**: Fixed type checking crash when task takes ``*args`` on Python 3
+  (Issue #3678).
+
+- Documentation and examples improvements by:
+
+    - **BLAGA Razvan-Paul**
+    - **Michael Howitz**
+    - :github_user:`paradox41`
+
 .. _version-4.0.1:
 
 4.0.1