diff --git a/app/Livewire/Forms/VoucherForm.php b/app/Livewire/Forms/VoucherForm.php
index 9e3c989..23f3bc7 100644
--- a/app/Livewire/Forms/VoucherForm.php
+++ b/app/Livewire/Forms/VoucherForm.php
@@ -5,6 +5,7 @@
 use App\Enums\IsActive;
 use App\Enums\VoucherType;
 use App\Models\Voucher;
+use App\Rules\UnsignedInteger;
 use Illuminate\Validation\Rule;
 use Livewire\Form;
 
@@ -53,19 +54,19 @@ public function rules(): array
                 Rule::when(
                     fn () => $this->type == VoucherType::PERCENTAGE->value,
                     ['integer', 'between:0,100'],
-                    ['numeric'],
+                    ['numeric', new UnsignedInteger],
                 ),
             ],
-            'min_purchase' => ['nullable', 'numeric'],
+            'min_purchase' => ['nullable', 'numeric', new UnsignedInteger],
             'max_discount' => [
                 Rule::when(
                     fn () => $this->type == VoucherType::PERCENTAGE->value,
-                    ['required', 'numeric', 'between:0,100'],
+                    ['required', 'numeric', new UnsignedInteger],
                     ['nullable'],
                 ),
             ],
-            'quota' => ['nullable', 'numeric'],
-            'limit_per_user' => ['nullable', 'numeric'],
+            'quota' => ['nullable', 'numeric', new UnsignedInteger],
+            'limit_per_user' => ['nullable', 'numeric', new UnsignedInteger],
             'start_date' => ['required', 'date'],
             'end_date' => ['nullable', 'date', 'after_or_equal:start_date'],
             'terms_conditions' => ['nullable', 'string'],