diff --git a/docs-js/release-notes.mdx b/docs-js/release-notes.mdx
index 9c71bb6709..915405d0b4 100644
--- a/docs-js/release-notes.mdx
+++ b/docs-js/release-notes.mdx
@@ -20,6 +20,14 @@ import LicenseBadge from '@site/src/sap/sdk-js/LicenseBadge';
 <!-- vale off -->
 <!-- This line is used for our release notes automation -->
 
+## 3.21.0 [Core Modules] - September 18, 2024
+
+### Improvements
+
+- [openapi-generator] Update generation of properties with `nullable: true` in the spec to include `type | null` in the output types. (d2a2394)
+- [openapi-generator] Normalize schemas that have `allOf`, `anyOf`, or `oneOf` alongside properties defined at the same level. (d2a2394)
+- [openapi-generator] Configure generated OpenAPI clients to handle `text/plain`, `application/octet-stream`, and wildcard `*/*` content types in response headers. (89f77cd)
+
 ## 3.20.0 [Core Modules] - August 27, 2024
 
 ### Compatibility Notes