diff --git a/changelog/bugfixes/2023-12-11-update-extension-custom-url.md b/changelog/bugfixes/2023-12-11-update-extension-custom-url.md
new file mode 100644
index 0000000000..3751bc4d95
--- /dev/null
+++ b/changelog/bugfixes/2023-12-11-update-extension-custom-url.md
@@ -0,0 +1 @@
+- Fixed supplying extension update payloads with a custom base URL in Nebraska ([Flatcar#1281](https://github.com/flatcar/Flatcar/issues/1281))
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 c4fde2bedd..4da71ffbec 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="322922fe1b0168b43c90915eced8873913c91182" # flatcar-3760-backport
+	CROS_WORKON_COMMIT="b86891bc510d139c102c6735e2c60c434c92dacd" # flatcar-3760-backport
 	KEYWORDS="amd64 arm64"
 fi