diff --git a/packages/webapp/src/containers/Customers/CustomerForm/CustomerForm.schema.tsx b/packages/webapp/src/containers/Customers/CustomerForm/CustomerForm.schema.tsx
index f93810ac3..8cdb5d308 100644
--- a/packages/webapp/src/containers/Customers/CustomerForm/CustomerForm.schema.tsx
+++ b/packages/webapp/src/containers/Customers/CustomerForm/CustomerForm.schema.tsx
@@ -29,7 +29,7 @@ const Schema = Yup.object().shape({
   billing_address_2: Yup.string().trim(),
   billing_address_city: Yup.string().trim(),
   billing_address_state: Yup.string().trim(),
-  billing_address_postcode: Yup.number().nullable(),
+  billing_address_postcode: Yup.string().nullable(),
   billing_address_phone: Yup.number(),
 
   shipping_address_country: Yup.string().trim(),
@@ -37,7 +37,7 @@ const Schema = Yup.object().shape({
   shipping_address_2: Yup.string().trim(),
   shipping_address_city: Yup.string().trim(),
   shipping_address_state: Yup.string().trim(),
-  shipping_address_postcode: Yup.number().nullable(),
+  shipping_address_postcode: Yup.string().nullable(),
   shipping_address_phone: Yup.number(),
 
   opening_balance: Yup.number().nullable(),
diff --git a/packages/webapp/src/containers/Vendors/VendorForm/VendorForm.schema.tsx b/packages/webapp/src/containers/Vendors/VendorForm/VendorForm.schema.tsx
index 6eb0edf71..5e64c61f0 100644
--- a/packages/webapp/src/containers/Vendors/VendorForm/VendorForm.schema.tsx
+++ b/packages/webapp/src/containers/Vendors/VendorForm/VendorForm.schema.tsx
@@ -22,7 +22,7 @@ const Schema = Yup.object().shape({
   billing_address_2: Yup.string().trim(),
   billing_address_city: Yup.string().trim(),
   billing_address_state: Yup.string().trim(),
-  billing_address_postcode: Yup.number().nullable(),
+  billing_address_postcode: Yup.string().nullable(),
   billing_address_phone: Yup.number(),
 
   shipping_address_country: Yup.string().trim(),
@@ -30,7 +30,7 @@ const Schema = Yup.object().shape({
   shipping_address_2: Yup.string().trim(),
   shipping_address_city: Yup.string().trim(),
   shipping_address_state: Yup.string().trim(),
-  shipping_address_postcode: Yup.number().nullable(),
+  shipping_address_postcode: Yup.string().nullable(),
   shipping_address_phone: Yup.number(),
 
   opening_balance: Yup.number().nullable(),