diff --git a/app/Models/User.php b/app/Models/User.php
index 88960994f..10c710f19 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -64,6 +64,7 @@ class User extends Model implements
      * @var array
      */
     protected $fillable = [
+        'external_id',
         'username',
         'email',
         'name_first',