diff --git a/CHANGES.md b/CHANGES.md
index c036cf1c..5b1a3c79 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,10 @@
 3.1.0 (in development)
 ======================
 
+- Some improvements to make cloudpickle more deterministic when pickling
+  dynamic functions and classes.
+  ([PR #524](https://github.com/cloudpipe/cloudpickle/pull/524))
+  
 
 3.0.0
 =====