diff --git a/lib/requestHandler.js b/lib/requestHandler.js
index 1bfdf34..4daa2cd 100644
--- a/lib/requestHandler.js
+++ b/lib/requestHandler.js
@@ -185,7 +185,7 @@ function userRequestHandler(req,userRes){
                         resourceInfo.statusCode = statusCode;
                         resourceInfo.resHeader  = resHeader;
                         resourceInfo.resBody    = serverResData;
-                        resourceInfo.length     = serverResData.length;
+                        resourceInfo.length     = serverResData ? serverResData.length : 0;
                         
                         GLOBAL.recorder && GLOBAL.recorder.updateRecord(resourceInfoId,resourceInfo);
 
diff --git a/package.json b/package.json
index 045b2bf..651c069 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "anyproxy",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "description": "a charles/fiddler like proxy written in NodeJs, which can handle HTTPS requests and CROS perfectly.",
   "main": "proxy.js",
   "bin": {