diff --git a/CHANGELOG.md b/CHANGELOG.md
index f924a7c8..cee79f17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## In development
+## 23.3 (2023-12-24)
 
 - Use ruff instead of black for formatting (#653).
 - Add support for Python 3.12 (#658).