diff --git a/CHANGELOG b/CHANGELOG
index cd51867..6b758fe 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,7 @@ Two empty lines before the next entry.
 External contributors notice at the end of the line: (LastName, FirstName / nick)
 
 
-## 1111-11-11 0.1.0
+## 2022-04-15 0.5.0
 Initial proof-of-concept release
-
+No manual yet, sorry for the inconvenience.
+The instrument definitions are not stable yet, in the sense of the README that they will never change.