diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 1f1e34d2d2..05853c9a5c 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=4230.2.3
+FLATCAR_VERSION=4230.2.3+nightly-20250917-2100
 FLATCAR_VERSION_ID=4230.2.3
-FLATCAR_BUILD_ID=""
+FLATCAR_BUILD_ID="nightly-20250917-2100"
 FLATCAR_SDK_VERSION=4230.0.0