diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 6e64eea..5d40d33 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.4.0
 commit = True
 tag = True
 
diff --git a/.github/workflows/conda_ci.yml b/.github/workflows/conda_ci.yml
index 9bfc714..7667b46 100644
--- a/.github/workflows/conda_ci.yml
+++ b/.github/workflows/conda_ci.yml
@@ -57,7 +57,7 @@ jobs:
 
       - name: "Install package"
         run: |
-          $CONDA/bin/conda install -c file://$(pwd)/conda-bld pypi-json=0.3.0=py_1 -y || exit 1
+          $CONDA/bin/conda install -c file://$(pwd)/conda-bld pypi-json=0.4.0=py_1 -y || exit 1
 
       - name: "Run Tests"
         run: |
diff --git a/README.rst b/README.rst
index f8cb8a4..73c4146 100644
--- a/README.rst
+++ b/README.rst
@@ -101,7 +101,7 @@ pypi-json
 .. |language| image:: https://img.shields.io/github/languages/top/repo-helper/pypi-json
 	:alt: GitHub top language
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/repo-helper/pypi-json/v0.3.0
+.. |commits-since| image:: https://img.shields.io/github/commits-since/repo-helper/pypi-json/v0.4.0
 	:target: https://github.com/repo-helper/pypi-json/pulse
 	:alt: GitHub commits since tagged version
 
diff --git a/doc-source/index.rst b/doc-source/index.rst
index e636862..806d95c 100644
--- a/doc-source/index.rst
+++ b/doc-source/index.rst
@@ -107,7 +107,7 @@ pypi-json
 		:alt: GitHub top language
 
 	.. |commits-since| github-shield::
-		:commits-since: v0.3.0
+		:commits-since: v0.4.0
 		:alt: GitHub commits since tagged version
 
 	.. |commits-latest| github-shield::
diff --git a/pypi_json/__init__.py b/pypi_json/__init__.py
index 997cda4..751bbcf 100644
--- a/pypi_json/__init__.py
+++ b/pypi_json/__init__.py
@@ -56,7 +56,7 @@
 __author__: str = "Dominic Davis-Foster"
 __copyright__: str = "2021 Dominic Davis-Foster"
 __license__: str = "MIT License"
-__version__: str = "0.3.0"
+__version__: str = "0.4.0"
 __email__: str = "dominic@davis-foster.co.uk"
 
 __all__ = ["PyPIJSON", "ProjectMetadata", "USER_AGENT"]
diff --git a/pyproject.toml b/pyproject.toml
index 4d5bde5..0174e10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "whey"
 
 [project]
 name = "pypi-json"
-version = "0.3.0"
+version = "0.4.0"
 description = "PyPI JSON API client library"
 readme = "README.rst"
 keywords = [ "json", "packaging", "pypi", "warehouse",]
diff --git a/repo_helper.yml b/repo_helper.yml
index 14175b4..bfd590c 100644
--- a/repo_helper.yml
+++ b/repo_helper.yml
@@ -7,7 +7,7 @@ email: 'dominic@davis-foster.co.uk'
 username: 'repo-helper'
 assignee: 'domdfcoding'
 primary_conda_channel: 'domdfcoding'
-version: '0.3.0'
+version: '0.4.0'
 license: 'MIT'
 short_desc: 'PyPI JSON API client library '