diff --git a/CHANGES.rst b/CHANGES.rst
index 9ae135e7..f3becc89 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,6 +3,9 @@
 
 - replace usages of ``copy_arrays`` with ``memmap`` [#306]
 
+- Added ``MEDIUM-DEEP`` to allowed readout patterns in JWST core schema
+  as well as keywords ``READPATT`` and ``PREADPATT``. [#315]
+
 2.0.0 (2024-06-24)
 ===================