diff --git a/values.yaml b/values.yaml
index 0180b45..f809e14 100644
--- a/values.yaml
+++ b/values.yaml
@@ -14,7 +14,8 @@ vcluster:
     - --kube-apiserver-arg=oidc-client-id=tobru-vcluster-test
     - --kube-apiserver-arg=oidc-groups-claim=groups
     - --kube-apiserver-arg=oidc-issuer-url=https://id.dev.appuio.cloud/auth/realms/appuio-cloud-dev
-    - --kube-apiserver-arg=oidc-username-claim=preferred_username
+    - --kube-apiserver-arg=oidc-username-claim=sub
+    - --kube-apiserver-arg=oidc-username-prefix=appuio#
   volumeMounts:
     - mountPath: /data
       name: data