diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e4dc33b71ddb60cfe556fd3af0db400734b354d8..3e0f907ae284424631f868c9d145bae6586f67b9 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,15 @@
+Changes in Release 2.4.0
+--------------------------------------------------------------------------------
+
+ * Add fast and flexible lDDT implementation. The new code is purely Python
+   based, natively supports complexes and is able to score DNA/RNA. The
+   deprecated lDDT implementation remains for consistency.
+ * Add algorithms to establish one to one mappings between chains in a reference
+   structure and a model.
+ * Substitution matrixes for RNA/DNA to compute alignments: seq.alg.IDENTITY and
+   seq.alg.NUC44
+ * Several minor bug fixes and improvements.
+
 Changes in Release 2.3.1
 --------------------------------------------------------------------------------