diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index d5488474b3f440..1b80ea2b8dbad0 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1 +1 @@
-FROM ghcr.io/containerbase/devcontainer:13.5.2
+FROM ghcr.io/containerbase/devcontainer:13.5.3
diff --git a/lib/config/options/index.ts b/lib/config/options/index.ts
index 73720128c617d6..ac16016318a1ad 100644
--- a/lib/config/options/index.ts
+++ b/lib/config/options/index.ts
@@ -516,7 +516,7 @@ const options: RenovateOptions[] = [
     description:
       'Change this value to override the default Renovate sidecar image.',
     type: 'string',
-    default: 'ghcr.io/containerbase/sidecar:13.5.2',
+    default: 'ghcr.io/containerbase/sidecar:13.5.3',
     globalOnly: true,
   },
   {