diff --git a/inventory/models.py b/inventory/models.py
index b42661a8..92d31d2c 100644
--- a/inventory/models.py
+++ b/inventory/models.py
@@ -2717,10 +2717,10 @@ class Notification(models.Model):
 
 class Vendor(models.Model, LocalizedNameMixin):
     dealer = models.ForeignKey(Dealer, on_delete=models.CASCADE, related_name="vendors")
-    crn = models.IntegerField(unique=True, verbose_name=_("Commercial Registration Number")
+    crn = models.CharField(unique=True, verbose_name=_("Commercial Registration Number")
     )
-    vrn = models.IntegerField(
-        unique=True, verbose_name=_("VAT Registration Number")
+    vrn = models.CharField(
+        max_length=15,unique=True, verbose_name=_("VAT Registration Number")
     )
     vendor_model = models.ForeignKey(
         VendorModel,