diff --git a/sdk_container/src/third_party/coreos-overlay/changelog/changes/2023-03-09-image-signing-key.md b/sdk_container/src/third_party/coreos-overlay/changelog/changes/2023-03-09-image-signing-key.md
new file mode 100644
index 0000000000..2d7ed5d8a0
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/changelog/changes/2023-03-09-image-signing-key.md
@@ -0,0 +1 @@
+- Added new image signing pub key to `flatcar-install`, needed for download verification of releases built from July 2023 onwards, if you have copies of `flatcar-install` or the image signing pub key, you need to update them as well ([init#92](https://github.com/flatcar/init/pull/92))
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/coreos-init-9999.ebuild b/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/coreos-init-9999.ebuild
index 7825d2271e..ac18276432 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/coreos-init-9999.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/coreos-init-9999.ebuild
@@ -10,7 +10,7 @@ CROS_WORKON_REPO="https://github.com"
 if [[ "${PV}" == 9999 ]]; then
 	KEYWORDS="~amd64 ~arm ~arm64 ~x86"
 else
-	CROS_WORKON_COMMIT="c97767857f7d9aff54645796635814f7be423e31" # flatcar-master
+	CROS_WORKON_COMMIT="3e6270ca55dabaa8c00322753bf409c8453f97a4" # flatcar-3510-backport
 	KEYWORDS="amd64 arm arm64 x86"
 fi