diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 75d95f92fa..7d25598579 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=4595.0.0+nightly-20260129-2100
-FLATCAR_VERSION_ID=4595.0.0
-FLATCAR_BUILD_ID="nightly-20260129-2100"
+FLATCAR_VERSION=4599.0.0+kai-default-confext
+FLATCAR_VERSION_ID=4599.0.0
+FLATCAR_BUILD_ID="kai-default-confext"
 FLATCAR_SDK_VERSION=4595.0.0+nightly-20260129-2100