diff --git a/traque.js b/traque.js
index 4f549a0..3252146 100644
--- a/traque.js
+++ b/traque.js
@@ -90,7 +90,10 @@ var server = http.createServer(option, function(req, res){
         res.writeHead(404, {'Content-Type': 'text/html'});
         return res.end("404 Not Found");
     }
-    res.writeHead(200, {'Content-Type': 'text/html'});
+    if(filename.endsWith('.js'))
+        res.writeHead(200, {'Content-Type': 'text/javascript'});
+    else
+        res.writeHead(200, {'Content-Type': 'text/html'});
     res.write(data);
     return res.end();
     });