diff --git a/bootstrapvz/base/manifest-schema.yml b/bootstrapvz/base/manifest-schema.yml
index 2582049..0bd0e5e 100644
--- a/bootstrapvz/base/manifest-schema.yml
+++ b/bootstrapvz/base/manifest-schema.yml
@@ -121,7 +121,8 @@ properties:
   plugins:
     type: object
     patternProperties:
-      ^\w+$: {type: object}
+      ^\w+$: {}
+    additionalProperties: false
   volume:
     type: object
     properties: