diff --git a/CHANGES.md b/CHANGES.md
index f6f0c49..0e3109a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,6 @@
 # Changelog for BROStar API
 
-## 0.66 (unreleased)
+## 0.66 (2024-12-05)
 
 
 - Hotfix: WellStability template error.
diff --git a/pyproject.toml b/pyproject.toml
index 5f3dcd4..bc4f9e1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ description = "Simplify data management for BRO"
 authors = []
 license = {file = "LICENSE.txt"}
 readme = "README.md"
-version = "0.66.dev0"
+version = "0.66"
 
 [project.optional-dependencies]
 test = ["pytest"] # pytest added by nens-meta