diff --git a/features/INDEX.md b/features/INDEX.md
index 823bb4e..7019ad6 100644
--- a/features/INDEX.md
+++ b/features/INDEX.md
@@ -80,7 +80,8 @@
 | PROJ-62 | Fix Cross-Tenant IDOR bei POP3-Konto-Löschung/-Import (Sicherheitsbug) | Deployed | [PROJ-62](PROJ-62-fix-pop3-tenant-idor.md) | 2026-06-25 |
 | PROJ-63 | Defensive Tenant-Scope-Härtung der Tenant-Verwaltungs-Endpunkte (FUND-2) | Deployed | [PROJ-63](PROJ-63-harden-tenant-admin-scope.md) | 2026-06-25 |
 | PROJ-64 | Session-Invalidation bei Passwort-Change + Datei-Permissions-Härtung (Security-Audit) | Deployed | [PROJ-64](PROJ-64-session-invalidation-file-permissions.md) | 2026-07-03 |
+| PROJ-65 | Physische Tenant-Trennung im Storage-Layer | Planned | [PROJ-65](PROJ-65-physische-tenant-trennung.md) | 2026-07-04 |
 
 <!-- Add features above this line -->
 
-## Next Available ID: PROJ-65
+## Next Available ID: PROJ-66