diff --git a/config_sample.json b/config_sample.json
index 55200b2..6f63c3f 100644
--- a/config_sample.json
+++ b/config_sample.json
@@ -13,7 +13,5 @@
   ],
   "ip_url": "http://members.3322.org/dyndns/getip",
   "log_path": "./godns.log",
-  "log_size": 16,
-  "log_num": 3,
   "socks5_proxy": ""
 }
diff --git a/settings.go b/settings.go
index e648381..6ac9904 100644
--- a/settings.go
+++ b/settings.go
@@ -21,8 +21,6 @@ type Settings struct {
 	Domains     []Domain `json:"domains"`
 	IPUrl       string   `json:"ip_url"`
 	LogPath     string   `json:"log_path"`
-	LogSize     int      `json:"log_size"`
-	LogNum      int      `json:"log_num"`
 	Socks5Proxy string   `json:"socks5_proxy"`
 }