diff --git a/CHANGELOG b/CHANGELOG
index 66ec612..5ee231c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,13 @@
 CHANGELOG
 =========
 
+0.4.0
+------
+
+* Upgrade kemitix-parent to 2.0.0
+* Add ImmutableTree implementation
+* Switch to static factory constructors
+
 0.3.0
 ------