diff --git a/rules/salty-dog.yml b/rules/salty-dog.yml
index 4452655..b1ea6f4 100644
--- a/rules/salty-dog.yml
+++ b/rules/salty-dog.yml
@@ -36,9 +36,9 @@ definitions:
         default: '$'
         minLength: 1
       filter:
-        type: object
+        $ref: "http://json-schema.org/draft-07/schema#"
       check:
-        type: object
+        $ref: "http://json-schema.org/draft-07/schema#"
 
 rules:
   - name: salty-dog-rule