diff --git a/rules/salty-dog.yml b/rules/salty-dog.yml
index d1a3f42..f51b867 100644
--- a/rules/salty-dog.yml
+++ b/rules/salty-dog.yml
@@ -73,6 +73,7 @@ rules:
               type: object
         name:
           type: string
+          pattern: "[-a-z]+"
         rules:
           type: array
           minItems: 1