diff --git a/lib/httpsServerMgr.js b/lib/httpsServerMgr.js
index 824bf42..65f054c 100644
--- a/lib/httpsServerMgr.js
+++ b/lib/httpsServerMgr.js
@@ -47,7 +47,7 @@ function SNIPrepareCert(serverName,SNICallback){
             SNICallback(null,ctx);
         }else{
             console.log("err occurred when prepare certs for SNI - " + err);
-            console.log("you may have to upgrade your Node.js to the lastest version");
+            console.log("you may upgrade your Node.js to the lastest version");
         }
     });
 }
diff --git a/rule_sample/rule_remove_cache_header.js b/rule_sample/rule_remove_cache_header.js
index 484c4bb..4018ddb 100644
--- a/rule_sample/rule_remove_cache_header.js
+++ b/rule_sample/rule_remove_cache_header.js
@@ -17,8 +17,4 @@ module.exports = {
 
         return header;
     }
-};
-
-function disableCacheHeader(header){
-
-}
\ No newline at end of file
+};
\ No newline at end of file