diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a8ea38..aff71fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.1] - 2021-07-08
+
+### Fixed
+
+ - [API endpoints no longer give CSRF errors when authenticated users visit an A/B testing page](https://github.com/torchbox/wagtail-ab-testing/pull/35)
+ - [Fixed incorrect cookie name causing wrong variant to be served to participants](https://github.com/torchbox/wagtail-ab-testing/pull/34)
+
 ## [0.3] - 2021-07-08
 
 ### Added
@@ -40,5 +47,6 @@ WAGTAIL_AB_TESTING = {
 }
 ```
 
+[0.3.1]: https://github.com/torchbox/wagtail-ab-testing/compare/v0.3...v0.3.1
 [0.3]: https://github.com/torchbox/wagtail-ab-testing/compare/v0.2...v0.3
 
diff --git a/setup.py b/setup.py
index 227e09d..dfcd15b 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 
 setup(
     name="wagtail-ab-testing",
-    version="0.3",
+    version="0.3.1",
     description="A/B Testing for Wagtail",
     author="Karl Hobley",
     author_email="karl@torchbox.com",