diff --git a/server.js b/server.js
index ae6ae96..a867ec1 100644
--- a/server.js
+++ b/server.js
@@ -71,7 +71,7 @@ app.all('/', function (req, res) {
     try {
         userFunction(context, callback);
     } catch(e) {
-        callback(500, "Internal server error")
+        callback(500, "Internal server error: " + e)
     }
 });