diff --git a/CHANGELOG.md b/CHANGELOG.md
index 265e305..b9d6d8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ 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).
 
 ## [Unreleased]
+
+## [0.4.0] - 2023-12-18
 - Scale down through divide and label image.
 - Optimize pathing via TSP.
 
diff --git a/src/splatbot/version.py b/src/splatbot/version.py
index e75c837..eca97dc 100644
--- a/src/splatbot/version.py
+++ b/src/splatbot/version.py
@@ -1,5 +1,5 @@
 _MAJOR = "0"
-_MINOR = "3"
+_MINOR = "4"
 # On main and in a nightly release the patch should be one ahead of the last
 # released build.
 _PATCH = "0"