diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 49774f83cd..d8cbb97b8c 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -143,6 +143,7 @@ Changelog
 
  * Fix: Avoid use of `ignore_conflicts` when creating extra permissions for snippets, for SQL Server compatibility (Sage Abdullah)
  * Fix: Ensure sequence on `wagtailsearchpromotions_query` table is correctly set after migrating data (Jake Howard)
+ * Fix: Update Pillow dependency to 9.1.0 (Daniel Kirkham)
 
 
 5.0.2 (21.06.2023)
diff --git a/docs/releases/5.0.3.md b/docs/releases/5.0.3.md
index cbf0ac282f..f73d8ddc67 100644
--- a/docs/releases/5.0.3.md
+++ b/docs/releases/5.0.3.md
@@ -15,3 +15,4 @@ depth: 1
 
  * Avoid use of `ignore_conflicts` when creating extra permissions for snippets, for SQL Server compatibility (Sage Abdullah)
  * Ensure sequence on `wagtailsearchpromotions_query` table is correctly set after migrating data (Jake Howard)
+ * Update Pillow dependency to 9.1.0 (Daniel Kirkham)