diff --git a/controllers/users.moon b/controllers/users.moon
index 2620ed0..cb21946 100644
--- a/controllers/users.moon
+++ b/controllers/users.moon
@@ -47,7 +47,7 @@ class User extends lapis.Application
       user\write_session @
 
       user.extension = "#{1000 + user.id}"
-      assert Users\update user
+      user\update "extension"
 
       token = Tokens\create {
         user_id: user.extension