diff --git a/docs/changelog/index.rst b/docs/changelog/index.rst
index 447877c..d2ab774 100644
--- a/docs/changelog/index.rst
+++ b/docs/changelog/index.rst
@@ -1,9 +1,11 @@
 Changelog
 =========
 
-0.4.2 (dev)
-~~~~~~~~~~~
+0.4.2
+~~~~~
 
+  - **BREAKING:** Regenerated internal ``*_pb2.py`` files, they now require
+    ``protobuf>=3.12.0``
   - Extended ``SendTrailingMetadata`` and ``RecvTrailingMetadata`` events with a
     status-related properties
   - Fixed deprecation warning related to ``asyncio.wait()`` and Python 3.9
diff --git a/grpclib/__init__.py b/grpclib/__init__.py
index b89d1d1..4cd58b9 100644
--- a/grpclib/__init__.py
+++ b/grpclib/__init__.py
@@ -1,7 +1,7 @@
 from .const import Status
 from .exceptions import GRPCError
 
-__version__ = '0.4.2rc2'
+__version__ = '0.4.2'
 
 __all__ = (
     'Status',