diff --git a/src/Entity/User.php b/src/Entity/User.php
index d52b38d..0fcc7b6 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -191,7 +191,7 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
         return $this->alternateEmail;
     }
 
-    public function setAlternateEmail(string $alternateEmail): static
+    public function setAlternateEmail(?string $alternateEmail): static
     {
         $this->alternateEmail = $alternateEmail;