diff --git a/TODO.md b/TODO.md
index ab9e8c3..bd1a84f 100644
--- a/TODO.md
+++ b/TODO.md
@@ -13,7 +13,7 @@ Trusted OS / applet
 * [x] Trusted applet RPC interface for key derivation or signing primitive
   unique to SoC/applet deployment.
 
-* [ ] Trusted OS enforcement of rollback protection for OS and applet firmware,
+* [x] Trusted OS enforcement of rollback protection for OS and applet firmware,
   through internal eMMC RPMB.
 
 * [x] Trusted OS USB API (HID based) for device information and applet