diff --git a/config_sample.json b/config_sample.json
index 9342af4..9a424ce 100644
--- a/config_sample.json
+++ b/config_sample.json
@@ -7,5 +7,5 @@
 	"ip_url": "http://members.3322.org/dyndns/getip",
 	"log_path":"./godns.log",
 	"log_size":16,
-	"log_num":3,
+	"log_num":3
 }