diff --git a/CHANGELOG.md b/CHANGELOG.md
index 291c515..e519b85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## [v5.2.0](https://github.com/mixpanel/mixpanel-python/tree/v5.2.0) (2026-07-10)
+
+### Features
+- add service account authentication support ([#175](https://github.com/mixpanel/mixpanel-python/pull/175))
+
+### Fixes
+- restore PyPy 3.9 compatibility by pinning pydantic ([#176](https://github.com/mixpanel/mixpanel-python/pull/176))
+
+[Full Changelog](https://github.com/mixpanel/mixpanel-python/compare/v5.1.0...v5.2.0)
+
 Release notes for the `mixpanel` Python package will be added here starting
 with the first release made under the standardized release process.
 
diff --git a/README.md b/README.md
index be11446..090d1ba 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # mixpanel-python
 
-##### _May 13, 2026_ - [v5.1.0](https://github.com/mixpanel/mixpanel-python/releases/tag/v5.1.0)
+##### _July 10, 2026_ - [v5.2.0](https://github.com/mixpanel/mixpanel-python/releases/tag/v5.2.0)
 
 [![PyPI](https://img.shields.io/pypi/v/mixpanel)](https://pypi.org/project/mixpanel)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/mixpanel)](https://pypi.org/project/mixpanel)
diff --git a/mixpanel/__init__.py b/mixpanel/__init__.py
index 673285c..5eaf4ef 100644
--- a/mixpanel/__init__.py
+++ b/mixpanel/__init__.py
@@ -30,7 +30,7 @@
 from .flags.remote_feature_flags import RemoteFeatureFlagsProvider
 from .flags.types import LocalFlagsConfig, RemoteFlagsConfig
 
-__version__ = "5.1.0"
+__version__ = "5.2.0"
 
 logger = logging.getLogger(__name__)