diff --git a/lib/router/index.js b/lib/router/index.js
index ef3f0c5..6188a84 100644
--- a/lib/router/index.js
+++ b/lib/router/index.js
@@ -33,8 +33,10 @@ router.createServer = function() {
 
 			    res.simpleJSON = function (code, obj) {
 			      var body = JSON.stringify(obj);
+				  var m = encodeURIComponent(body).match(/%[89ABab]/g);
+				  
 			      res.writeHead(code, [ ["Content-Type", "text/json"]
-			                           , ["Content-Length", body.length]
+			                           , ["Content-Length", (body.length + (m ? m.length : 0))]
 			                           ]);
 			      res.write(body);
 			      res.end();