diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 541e2bd8..a8484d19 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,14 +1,15 @@
 [bumpversion]
-current_version = 4.0.0
+current_version = 4.0.1
 commit = True
 tag = True
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?P<releaselevel>[a-z]+)?
-serialize =
-    {major}.{minor}.{patch}{releaselevel}
-    {major}.{minor}.{patch}
+serialize = 
+	{major}.{minor}.{patch}{releaselevel}
+	{major}.{minor}.{patch}
 
 [bumpversion:file:kombu/__init__.py]
 
 [bumpversion:file:docs/includes/introduction.txt]
 
 [bumpversion:file:README.rst]
+
diff --git a/README.rst b/README.rst
index 9eac874d..ce0d014a 100644
--- a/README.rst
+++ b/README.rst
@@ -4,7 +4,7 @@
 
 |build-status| |coverage| |license| |wheel| |pyversion| |pyimp|
 
-:Version: 4.0.0
+:Version: 4.0.1
 :Web: http://kombu.me/
 :Download: http://pypi.python.org/pypi/kombu/
 :Source: https://github.com/celery/kombu/
diff --git a/docs/includes/introduction.txt b/docs/includes/introduction.txt
index 229f1abc..911cea5a 100644
--- a/docs/includes/introduction.txt
+++ b/docs/includes/introduction.txt
@@ -1,4 +1,4 @@
-:Version: 4.0.0
+:Version: 4.0.1
 :Web: http://kombu.me/
 :Download: http://pypi.python.org/pypi/kombu/
 :Source: https://github.com/celery/kombu/
diff --git a/kombu/__init__.py b/kombu/__init__.py
index f1303de9..3c76591e 100644
--- a/kombu/__init__.py
+++ b/kombu/__init__.py
@@ -10,7 +10,7 @@ if sys.version_info < (2, 7):  # pragma: no cover
 
 from collections import namedtuple  # noqa
 
-__version__ = '4.0.0'
+__version__ = '4.0.1'
 __author__ = 'Ask Solem'
 __contact__ = 'ask@celeryproject.org'
 __homepage__ = 'https://kombu.readthedocs.io'