diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f5e886..5567f42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Next version
+## 0.4.0 - August 11, 2023
 
 ### 🔥 Breaking changes
 
diff --git a/pyproject.toml b/pyproject.toml
index 6829c3d..4b07bc5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "sdss-lvmcam"
-version = "0.4.0a0"
+version = "0.4.0"
 description = "The package for lvmcam"
 authors = ["Florian Briegel <briegel@mpia.de>"]
 maintainers = ["Florian Briegel <briegel@mpia.de>", "José Sánchez-Gallego <gallegoj@uw.edu>"]