diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 986804613c..c0fdd0a8c3 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=4459.1.2+nightly-20251203-2100
-FLATCAR_VERSION_ID=4459.1.2
-FLATCAR_BUILD_ID="nightly-20251203-2100"
+FLATCAR_VERSION=4459.2.1+nightly-20251204-2100
+FLATCAR_VERSION_ID=4459.2.1
+FLATCAR_BUILD_ID="nightly-20251204-2100"
 FLATCAR_SDK_VERSION=4459.0.0