diff --git a/lib/recorder.js b/lib/recorder.js
index 19cad6f..7053072 100644
--- a/lib/recorder.js
+++ b/lib/recorder.js
@@ -12,7 +12,7 @@ function Recorder(option){
         db;
 
     option = option || {};
-    if(option.filename){
+    if(option.filename && typeof option.filename == "string"){
 
         try{
             if(fs.existsSync(option.filename)){
diff --git a/package.json b/package.json
index 8bf25b2..2eb9975 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "anyproxy",
-  "version": "2.5.1",
+  "version": "2.6.0",
   "description": "A fully configurable proxy in NodeJS, which can handle HTTPS requests perfectly.",
   "main": "proxy.js",
   "bin": {