diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 48d5c6ade0..c34ec10aa2 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=3530.0.0+nightly-20230301-2100
-FLATCAR_VERSION_ID=3530.0.0
-FLATCAR_BUILD_ID="nightly-20230301-2100"
-FLATCAR_SDK_VERSION=3530.0.0+nightly-20230301-2100
+FLATCAR_VERSION=3531.0.0+nightly-20230302-2100
+FLATCAR_VERSION_ID=3531.0.0
+FLATCAR_BUILD_ID="nightly-20230302-2100"
+FLATCAR_SDK_VERSION=3531.0.0+nightly-20230302-2100
diff --git a/sdk_container/src/third_party/portage-stable b/sdk_container/src/third_party/portage-stable
index 4f6b8201b5..31d34ae4d2 160000
--- a/sdk_container/src/third_party/portage-stable
+++ b/sdk_container/src/third_party/portage-stable
@@ -1 +1 @@
-Subproject commit 4f6b8201b52957f0f37f4b7783629b6fbb49d6a1
+Subproject commit 31d34ae4d2260367aa7f7fbe7d06f19712f2ee0d