diff --git a/CHANGES.md b/CHANGES.md
index e31bd4a..93c411d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,4 @@
-## 0.4.0 (Unreleased)
+## 0.4.0 (November 28, 2021)
 
 - Switch from To.ml to OTOML library (#1, Daniil Baturin).
 - Close a leaked file handle.