diff --git a/.demo/env/secrets.settings.yaml b/.demo/env/secrets.settings.yaml
index 21ba2ced30..d95ba169ed 100644
--- a/.demo/env/secrets.settings.yaml
+++ b/.demo/env/secrets.settings.yaml
@@ -24,12 +24,12 @@ home:
     slack:
         url: https://hooks.slack.com/services/id
     email:
-        criticals: admins@yourdoma.in
+        critical: admins@yourdoma.in
 alerts:
     slack:
         url: https://hooks.slack.com/services/id
     email:
         smtp:
             smarthost: some.smtp.host:587
-        nonCriticals: admins@yourdoma.in
-        criticals: admins@yourdoma.in
+        nonCritical: admins@yourdoma.in
+        critical: admins@yourdoma.in
diff --git a/values-schema.yaml b/values-schema.yaml
index 78d5d27585..0120e0ff15 100644
--- a/values-schema.yaml
+++ b/values-schema.yaml
@@ -225,7 +225,6 @@ definitions:
             type: string
             default: mon-otomi
             description: 'The Slack channel for critical notifications.'
-        required: [url]
       msteams:
         type: object
         additionalProperties: false
@@ -236,9 +235,9 @@ definitions:
           lowPrio:
             type: string
             description: The high prio web hook
-        required: [highPrio, lowPrio]
       email:
         type: object
+        additionalProperties: false
         properties:
           nonCritical:
             description: One or more email addresses (comma separated) for non-critical events.
@@ -247,6 +246,8 @@ definitions:
             description: One or more email addresses (comma separated) for critical events.
             '$ref': '#/definitions/email'
           smtp:
+            type: object
+            additionalProperties: false
             properties:
               from:
                 description: The "from" address. Defaults to alerts@$clusterDomain.