diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 27a843fb..09bfcde0 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.0.0
+current_version = 4.0.0
 commit = True
 tag = True
 
diff --git a/README.rst b/README.rst
index 2137c118..84a85786 100644
--- a/README.rst
+++ b/README.rst
@@ -39,9 +39,9 @@ Overview
 .. |conda-forge| image:: https://img.shields.io/conda/vn/conda-forge/pytest-cov.svg
     :target: https://anaconda.org/conda-forge/pytest-cov
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/pytest-dev/pytest-cov/v3.0.0.svg
+.. |commits-since| image:: https://img.shields.io/github/commits-since/pytest-dev/pytest-cov/v4.0.0.svg
     :alt: Commits since latest release
-    :target: https://github.com/pytest-dev/pytest-cov/compare/v3.0.0...master
+    :target: https://github.com/pytest-dev/pytest-cov/compare/v4.0.0...master
 
 .. |wheel| image:: https://img.shields.io/pypi/wheel/pytest-cov.svg
     :alt: PyPI Wheel
diff --git a/docs/conf.py b/docs/conf.py
index 5dd4e74b..d417ed00 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -23,7 +23,7 @@
 year = '2016'
 author = 'pytest-cov contributors'
 copyright = f'{year}, {author}'
-version = release = '3.0.0'
+version = release = '4.0.0'
 
 pygments_style = 'trac'
 templates_path = ['.']
diff --git a/setup.py b/setup.py
index 8d20c134..799d4699 100755
--- a/setup.py
+++ b/setup.py
@@ -87,7 +87,7 @@ def run(self):
 
 setup(
     name='pytest-cov',
-    version='3.0.0',
+    version='4.0.0',
     license='MIT',
     description='Pytest plugin for measuring coverage.',
     long_description='{}\n{}'.format(read('README.rst'), re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst'))),
diff --git a/src/pytest_cov/__init__.py b/src/pytest_cov/__init__.py
index fba1d219..9dfd9823 100644
--- a/src/pytest_cov/__init__.py
+++ b/src/pytest_cov/__init__.py
@@ -1,2 +1,2 @@
 """pytest-cov: avoid already-imported warning: PYTEST_DONT_REWRITE."""
-__version__ = '3.0.0'
+__version__ = '4.0.0'