diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index d0299e5..de3ed48 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.6.3
+current_version = 0.6.4
 commit = True
 tag = True
 
diff --git a/README.rst b/README.rst
index ca43379..0933519 100644
--- a/README.rst
+++ b/README.rst
@@ -101,7 +101,7 @@ Enum Tools
 .. |language| image:: https://img.shields.io/github/languages/top/domdfcoding/enum_tools
 	:alt: GitHub top language
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/domdfcoding/enum_tools/v0.6.3
+.. |commits-since| image:: https://img.shields.io/github/commits-since/domdfcoding/enum_tools/v0.6.4
 	:target: https://github.com/domdfcoding/enum_tools/pulse
 	:alt: GitHub commits since tagged version
 
diff --git a/__pkginfo__.py b/__pkginfo__.py
index ae386c7..9dac2e2 100644
--- a/__pkginfo__.py
+++ b/__pkginfo__.py
@@ -26,7 +26,7 @@
 2020-2021 Dominic Davis-Foster <dominic@davis-foster.co.uk>
 """
 
-__version__ = "0.6.3"
+__version__ = "0.6.4"
 
 repo_root = pathlib.Path(__file__).parent
 install_requires = (repo_root / "requirements.txt").read_text(encoding="utf-8").split('\n')
diff --git a/doc-source/index.rst b/doc-source/index.rst
index a906609..d6ba6e7 100644
--- a/doc-source/index.rst
+++ b/doc-source/index.rst
@@ -112,7 +112,7 @@ Enum Tools
 	:alt: GitHub top language
 
 .. |commits-since| github-shield::
-	:commits-since: v0.6.3
+	:commits-since: v0.6.4
 	:alt: GitHub commits since tagged version
 
 .. |commits-latest| github-shield::
diff --git a/enum_tools/__init__.py b/enum_tools/__init__.py
index 8d1349f..2f8efd0 100644
--- a/enum_tools/__init__.py
+++ b/enum_tools/__init__.py
@@ -33,7 +33,7 @@
 __author__: str = "Dominic Davis-Foster"
 __copyright__: str = "2020 Dominic Davis-Foster"
 __license__: str = "GNU Lesser General Public License v3 or later (LGPLv3+)"
-__version__: str = "0.6.3"
+__version__: str = "0.6.4"
 __email__: str = "dominic@davis-foster.co.uk"
 
 __all__ = [
diff --git a/repo_helper.yml b/repo_helper.yml
index c17646e..dc1cd68 100644
--- a/repo_helper.yml
+++ b/repo_helper.yml
@@ -4,7 +4,7 @@ modname: enum_tools
 copyright_years: "2020-2021"
 author: "Dominic Davis-Foster"
 email: "dominic@davis-foster.co.uk"
-version: "0.6.3"
+version: "0.6.4"
 username: "domdfcoding"
 license: 'LGPLv3+'
 short_desc: "Tools to expand Python's enum module."