diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 9504a82695..9a62ea128e 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -24,6 +24,7 @@ $ git -C forgejo log --oneline --no-merges origin/v1.20/forgejo..origin/v1.21/fo
   - [Some Forgejo CLI options have changed](https://codeberg.org/forgejo/forgejo/commit/d0dbe52e76f3038777c3b50066e3636105387ca3) and scripts may need to be updated. For instance `--verbose` is no longer a global option and is implemented on a per sub-command basis. Check `forgejo --help` or `forgejo docs` for more information.
   - [Remove "CHARSET" config option for MySQL and always use "utf8mb4"](https://codeberg.org/forgejo/forgejo/commit/ce46834b938eb687152a680669ada95a26304178). It has been a requirement for years and specifying anything else is likely to cause issues.
   - [Set SSH_AUTHORIZED_KEYS_BACKUP to false by default](https://codeberg.org/forgejo/forgejo/commit/469d89b95a1ce18dd34808a95c7230375e828e24). There is no automatic cleanup of these backups and can end up using a significant amount of disk space over time.
+  - [The minimum RSA keylength is now 3072 instead of 2048](https://codeberg.org/forgejo/forgejo/commit/c533991519816313dfaa0ddcec183756a97b9348).
 - **Forgejo Actions:**
   It is now enabled by default but should still be considered alpha stage and subject to unannounced breaking changes.
   - The API can now be used to manage secrets for [users](https://code.forgejo.org/api/swagger/#/user/updateUserSecret), [organizations](https://code.forgejo.org/api/swagger/#/organization/orgListActionsSecrets) and [repositories](https://code.forgejo.org/api/swagger/#/repository/updateRepoSecret).