diff --git a/changelog.md b/changelog.md
index 5d54fecb8dcd0acc40870e2528d91b9ef5e942e9..3d0f2f71a2f6543d8560907b2e00b2b9e7445b7d 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,12 @@
 binary
 ======
 
+
+binary-0.7.3.0
+--------------
+
+- Add Binary instance for Natural (only with base > 4.8).
+
 binary-0.7.2.3
 --------------