diff --git a/src/Bridges/EmailAddressInputForms/ExtensionMethodRegistrator.php b/src/Bridges/EmailAddressInputForms/ExtensionMethodRegistrator.php
index d8fc279..a778a4d 100644
--- a/src/Bridges/EmailAddressInputForms/ExtensionMethodRegistrator.php
+++ b/src/Bridges/EmailAddressInputForms/ExtensionMethodRegistrator.php
@@ -6,6 +6,7 @@
 use Nepada\EmailAddressInput\EmailAddressInput;
 use Nette;
 use Nette\Forms\Container;
+use Nette\Utils\Html;
 
 class ExtensionMethodRegistrator
 {
@@ -16,9 +17,9 @@ public static function register(): void
     {
         Container::extensionMethod(
             'addEmailAddress',
-            function (Container $container, $name, $label = null, bool $caseSensitive = false): EmailAddressInput {
+            function (Container $container, string|int $name, string|Html|null $label = null, bool $caseSensitive = false): EmailAddressInput {
                 $control = new EmailAddressInput($label, null, $caseSensitive);
-                $container[$name] = $control;
+                $container[(string) $name] = $control;
                 return $control;
             },
         );