diff --git a/Changes b/Changes
index 4c6c831..e5eb906 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,13 @@
+OCaml 4.04.0+copatterns 0.4 :
+-----------------------------
+
+### Transformation:
+
+- New syntax for cofunction declarations (let corec, cofunction,..).
+- Nested copattern-matching.
+- Full copattern-matching.
+
+
 OCaml 4.04.0+copatterns 0.3 :
 -----------------------------