diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-1.20.0.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-1.21.0.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-1.20.0.ebuild
rename to sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-1.21.0.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-9999.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-9999.ebuild
index ea49ab2005..665dda039e 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-9999.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/app-emulation/rkt/rkt-9999.ebuild
@@ -18,7 +18,7 @@ if [[ "${PV}" == "9999" ]]; then
 	KEYWORDS="~amd64 ~arm64"
 else
 	KEYWORDS="amd64 arm64"
-	CROS_WORKON_COMMIT="1e6e9cd4e669c47e21b269a0c4a01f740172619b" # v1.20.0
+	CROS_WORKON_COMMIT="c938d233200aec012f4adbc70f08d8805641330f" # v1.21.0
 fi
 
 PXE_VERSION="1235.0.0"