diff --git a/basic/apps/ninja/invoiceninja-values-configmap.yaml b/basic/apps/ninja/invoiceninja-values-configmap.yaml
index a52d0fd..e0b38fe 100644
--- a/basic/apps/ninja/invoiceninja-values-configmap.yaml
+++ b/basic/apps/ninja/invoiceninja-values-configmap.yaml
@@ -6,6 +6,8 @@ metadata:
 data:
   values.yaml: |
     # https://github.com/invoiceninja/dockerfiles/blob/master/charts/invoiceninja/values.yaml
+    image:
+      tag: 5.5.31
     ingress:
       enabled: true
       hostname: "ninja.${domain}"
@@ -26,11 +28,15 @@ data:
       auth:
         password: "${redis_password}"
 
+    debug: true
+    appURL: "https://ninja.ftt.gmbh"
     userEmail: "${admin_email}"
     userPassword: "${password}"
     mailer: "smtp" # FIXME use "${outgoing_mail_enabled}"
     # https://github.com/invoiceninja/invoiceninja/blob/v5-stable/config/mail.php#L36
     extraEnvVars:
+      - name: MAIL_MAILER
+        value: smtp
       - name: MAIL_HOST
         value: "${outgoing_mail_smtp_host}"
       - name: MAIL_PORT