diff --git a/CHANGES.rst b/CHANGES.rst
index 626edaa4a..3f2510131 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,19 @@
 Changelog
 =========
 
+Version 20.0a4
+==============
+*Released 2022-08-27*
+
+This is the technical changelog for version 20.0a4. More elaborate release notes can be found in the news channel `@pythontelegrambotchannel <https://t.me/pythontelegrambotchannel>`_.
+
+Hot Fixes
+---------
+
+* Fix a Bug in ``setup.py`` Regarding Optional Dependencies (`#3209`_)
+
+.. _`#3209`: https://github.com/python-telegram-bot/python-telegram-bot/pull/3209
+
 Version 20.0a3
 ==============
 *Released 2022-08-27*
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 037623e73..3227dcc54 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -29,9 +29,9 @@ author = "Leandro Toledo"
 # built documents.
 #
 # The short X.Y version.
-version = "20.0a3"  # telegram.__version__[:3]
+version = "20.0a4"  # telegram.__version__[:3]
 # The full version, including alpha/beta/rc tags.
-release = "20.0a3"  # telegram.__version__
+release = "20.0a4"  # telegram.__version__
 
 # If your documentation needs a minimal Sphinx version, state it here.
 needs_sphinx = "4.5.0"
diff --git a/telegram/_version.py b/telegram/_version.py
index 77a2f16f0..503d54014 100644
--- a/telegram/_version.py
+++ b/telegram/_version.py
@@ -50,7 +50,7 @@ class Version(NamedTuple):
         return version
 
 
-__version_info__ = Version(major=20, minor=0, micro=0, releaselevel="alpha", serial=3)
+__version_info__ = Version(major=20, minor=0, micro=0, releaselevel="alpha", serial=4)
 __version__ = str(__version_info__)
 
 # # SETUP.PY MARKER