diff --git a/config/schema/mailmute.schema.yml b/config/schema/mailmute.schema.yml
index e10ca51..33fb6ec 100644
--- a/config/schema/mailmute.schema.yml
+++ b/config/schema/mailmute.schema.yml
@@ -1,6 +1,6 @@
 mailmute.settings:
   label: 'Mailmute settings'
-  type: mapping
+  type: config_object
   mapping:
     show_message:
       label: 'Show suppress notification'
@@ -19,4 +19,4 @@ field.value.sendstate:
 
 mailmute.sendstate_configuration.*:
   label: 'Sendstate plugin configuration'
-  type: mapping
+  type: config_object