diff --git a/package.json b/package.json
index 12fdc17..150586b 100644
--- a/package.json
+++ b/package.json
@@ -163,7 +163,8 @@
             "_ensureIndex",
             "_verifyEmailToken",
             "_resetPasswordToken",
-            "_name"
+            "_name",
+            "_str"
           ]
         }
       ],