diff --git a/config.sample.json b/config.sample.json
index b713468..f1c6256 100644
--- a/config.sample.json
+++ b/config.sample.json
@@ -9,7 +9,7 @@
         }
     },
     "domain": [{
-        "name": "example.com",
+        "name": "example.com.",
         "sub": [
             { "name": "sub1" }
         ]