diff --git a/lib/models/auth.js b/lib/models/auth.js
index f3f87ee..a75d3b9 100644
--- a/lib/models/auth.js
+++ b/lib/models/auth.js
@@ -5,7 +5,7 @@ var _ = require('lodash');
 exports.attributes = function(attr){
   var template = {
     facebookId: {
-      type: 'float',
+      type: 'string',
       unique: true
     },
     name:{