diff --git a/app/Models/Asset.php b/app/Models/Asset.php
index ea19ea836e..d588690ba4 100644
--- a/app/Models/Asset.php
+++ b/app/Models/Asset.php
@@ -282,7 +282,7 @@ class Asset extends Depreciable
     protected function warrantyExpires(): Attribute
     {
         return Attribute:: make(
-            get: fn(mixed $value, array $attributes) => ($attributes['warranty_months'] && $attributes['purchase_date']) ? Carbon::parse($attributes['purchase_date'])->addMonths($attributes['warranty_months']) : null,
+            get: fn(mixed $value, array $attributes) => ($attributes['warranty_months'] && $attributes['purchase_date']) ? Carbon::parse($attributes['purchase_date'])->addMonths((int)$attributes['warranty_months']) : null,
         );
     }