diff --git a/CHANGES.rst b/CHANGES.rst
index 30ffb32..34872e9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,7 @@
 6.3 (unreleased)
 ----------------
 
-- Add preliminary support for Python 3.13 as of 3.13a3.
+- Add preliminary support for Python 3.13 as of 3.13a3. Requiring ``zope.proxy >= 5.2``.
 
 
 6.2 (2023-10-05)