add gpg key
diff --git a/metadata/service/server/vendor_repo.yml b/metadata/service/server/vendor_repo.yml
index 60a546e..b6bdf1e 100644
--- a/metadata/service/server/vendor_repo.yml
+++ b/metadata/service/server/vendor_repo.yml
@@ -4,3 +4,4 @@
       repo:
         maas:
           source: deb http://ppa.launchpad.net/maas/next/ubuntu trusty main
+          key_url: salt://maas/files/vendor_key.gpg
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