diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d66e79..cab0091 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ and this project adheres to
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
-## [Unreleased]
+## [v4.3.1] - 2023-03-20
 ### Fixed
 - Previously, all the trees in `QuantileRegressionForest` were the same. This has now
   been fixed. Thanks to @gugerlir for noticing this!
diff --git a/pyproject.toml b/pyproject.toml
index 7472f43..34efb64 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "doubt"
-version = "4.3.0"
+version = "4.3.1"
 description = "Bringing back uncertainty to machine learning."
 authors = ["Dan Saattrup Nielsen <saattrupdan@gmail.com>"]
 readme = "README.md"