diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 670033c90d..b0fbe782d7 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=4081.3.6
-FLATCAR_VERSION_ID=4081.3.6
-FLATCAR_BUILD_ID=""
+FLATCAR_VERSION=4081.3.5+nightly-20250912-2100
+FLATCAR_VERSION_ID=4081.3.5
+FLATCAR_BUILD_ID="nightly-20250912-2100"
 FLATCAR_SDK_VERSION=4081.0.0