diff --git a/sdk_container/.repo/manifests/version.txt b/sdk_container/.repo/manifests/version.txt
index 2c037e02d1..ec5f09f468 100644
--- a/sdk_container/.repo/manifests/version.txt
+++ b/sdk_container/.repo/manifests/version.txt
@@ -1,4 +1,4 @@
-FLATCAR_VERSION=3815.2.0+nightly-20240319-2100
-FLATCAR_VERSION_ID=3815.2.0
-FLATCAR_BUILD_ID="nightly-20240319-2100"
+FLATCAR_VERSION=3815.2.1+nightly-20240321-2100
+FLATCAR_VERSION_ID=3815.2.1
+FLATCAR_BUILD_ID="nightly-20240321-2100"
 FLATCAR_SDK_VERSION=3815.0.0