diff --git a/metadata/service/master/single.yml b/metadata/service/master/single.yml
index 6a56ca5..172f009 100644
--- a/metadata/service/master/single.yml
+++ b/metadata/service/master/single.yml
@@ -17,7 +17,7 @@
         allow_privileged: True
       apiserver:
         address: ${_param:single_address}
-        insecure_address: 0.0.0.0
+        insecure_address: 127.0.0.1
       etcd:
         members:
           - host: ${_param:single_address}