diff --git a/CHANGES.rst b/CHANGES.rst
index 6221fe5514d..b1d802891a4 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,9 @@ Changelog (Pillow)
 9.3.0 (unreleased)
 ------------------
 
+- Release Python GIL when converting images using matrix operations #6418
+  [hmaarrfk]
+
 - Added ExifTags enums #6630
   [radarhere]