diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-0.4.10-r5.ebuild b/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-0.4.10-r6.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-0.4.10-r5.ebuild
rename to sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-0.4.10-r6.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-9999.ebuild b/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-9999.ebuild
index 2635599ba2..8d1167674d 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-9999.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/coreos-base/update_engine/update_engine-9999.ebuild
@@ -8,7 +8,7 @@ CROS_WORKON_REPO="https://github.com"
 if [[ "${PV}" == 9999 ]]; then
 	KEYWORDS="~amd64 ~arm ~arm64 ~x86"
 else
-	CROS_WORKON_COMMIT="de8da9b92d6db3f08bd83f01cc8de2b3c15e675e" # flatcar-master
+	CROS_WORKON_COMMIT="748eb99b18b67747f2e047327e9f2a18aa09d3b5" # flatcar-master
 	KEYWORDS="amd64 arm64"
 fi
 
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/arm64/package.accept_keywords b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/arm64/package.accept_keywords
index ce0f4b8446..4e079806b8 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/arm64/package.accept_keywords
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/arm64/package.accept_keywords
@@ -3,17 +3,15 @@
 
 # needed by arm64-native SDK
 =app-emulation/open-vmdk-1.0 *
+=app-crypt/rhash-1.4.2 ~arm64
 
 =app-misc/jq-1.6-r3 ~arm64
-=dev-cpp/gflags-2.2.0 ~arm64
 =dev-embedded/u-boot-tools-2021.04_rc2 ~arm64
 
 # needed by arm64-native SDK
 =dev-lang/nasm-2.14.02 *
 
 =dev-lang/yasm-1.3.0-r1 ~arm64
-=dev-libs/libassuan-2.5.1 ~arm64
-=dev-libs/libusb-1.0.21 ~arm64
 
 # needed to force enable bpftool for arm64
 =dev-util/bpftool-5.15.8 **
@@ -39,7 +37,6 @@
 =sys-apps/policycoreutils-3.1-r3 ~arm64
 =sys-apps/kexec-tools-2.0.22 ~arm64
 
-=sys-apps/sandbox-2.12 ~arm64
 =sys-apps/semodule-utils-3.1 ~arm64
 
 # needed to force enable ipvsadm for arm64
@@ -47,7 +44,6 @@
 
 =sys-firmware/edk2-aarch64-18.02 **
 =sys-fs/btrfs-progs-4.19.1 ~arm64
-=sys-fs/quota-4.04-r1 ~arm64
 =sys-libs/libselinux-3.1-r2 ~arm64
 =sys-libs/libsemanage-3.1-r1 ~arm64
 =sys-libs/libsepol-3.1 ~arm64
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
index 8574c56c03..e02b5e85a6 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
@@ -6,7 +6,6 @@
 app-arch/tar		minimal
 app-crypt/mit-krb5	-keyutils
 dev-libs/dbus-glib	tools
-dev-libs/protobuf 	-python
 dev-libs/libxml2	-python
 dev-util/perf		tui -doc
 dev-vcs/git		webdav curl bash-completion
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/package.accept_keywords b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/package.accept_keywords
index 691e679f06..40aeb5865c 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/package.accept_keywords
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/package.accept_keywords
@@ -1 +1 @@
-=app-crypt/efitools-1.8.1 ~amd64 ~arm64
+=app-crypt/efitools-1.9.2 ~arm64