diff --git a/src/Form/Type/QRCodeMoneyType.php b/src/Form/Type/QRCodeMoneyType.php
index 45e77d6..e19664b 100644
--- a/src/Form/Type/QRCodeMoneyType.php
+++ b/src/Form/Type/QRCodeMoneyType.php
@@ -23,7 +23,7 @@ class QRCodeMoneyType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
-            ->add('amount', NumberType::class)
+            ->add('amount', NumberType::class, ['invalid_message' => 'messages.not_valid_amount'])
             ->add('currency', ChoiceType::class, [
                 'choices' => array_combine(
                     iterator_to_array($this->currencyLister->getCurrencies()),