diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index a079226e..e2dd1954 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -7,6 +7,11 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+4.2.0
+-----
+- Add support of Python 3.9.
+- Update readme.
+
 4.1.8
 -----
 - Update asyncio daemon, single- and multi-container examples to use ``Resource`` provider.
diff --git a/src/dependency_injector/__init__.py b/src/dependency_injector/__init__.py
index 0561da83..8f599cdd 100644
--- a/src/dependency_injector/__init__.py
+++ b/src/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Top-level package."""
 
-__version__ = '4.1.8'
+__version__ = '4.2.0'
 """Version number.
 
 :type: str