diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index 6399d55cb49..830b2bd2f90 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -432,10 +432,10 @@ class website_sale(http.Controller):
 
         return values
 
-    mandatory_billing_fields = ["name", "phone", "email", "street2", "city", "country_id", "zip"]
-    optional_billing_fields = ["street", "state_id", "vat", "vat_subjected"]
-    mandatory_shipping_fields = ["name", "phone", "street", "city", "country_id", "zip"]
-    optional_shipping_fields = ["state_id"]
+    mandatory_billing_fields = ["name", "phone", "email", "street2", "city", "country_id"]
+    optional_billing_fields = ["street", "state_id", "vat", "vat_subjected", "zip"]
+    mandatory_shipping_fields = ["name", "phone", "street", "city", "country_id"]
+    optional_shipping_fields = ["state_id", "zip"]
 
     def checkout_parse(self, address_type, data, remove_prefix=False):
         """ data is a dict OR a partner browse record
diff --git a/addons/website_sale/views/templates.xml b/addons/website_sale/views/templates.xml
index ef216beb6c8..929d2efd052 100644
--- a/addons/website_sale/views/templates.xml
+++ b/addons/website_sale/views/templates.xml
@@ -882,7 +882,7 @@
                       <input type="text" name="city" class="form-control" t-att-value="checkout.get('city')"/>
                   </div>
                   <div t-attf-class="form-group #{error.get('zip') and 'has-error' or ''} col-lg-6">
-                      <label class="control-label" for="zip">Zip / Postal Code</label>
+                      <label class="control-label" for="zip" style="font-weight: normal">Zip / Postal Code</label>
                       <input type="text" name="zip" class="form-control" t-att-value="checkout.get('zip')"/>
                   </div>
                   <div t-attf-class="form-group #{error.get('country_id') and 'has-error' or ''} col-lg-6">
@@ -946,7 +946,7 @@
                       <input type="text" name="shipping_city" class="form-control" t-att-value="checkout.get('shipping_city', '')" t-att-readonly=" 'readonly' if shipping_id &gt;= 0 else ''"/>
                   </div>
                   <div t-attf-class="form-group #{error.get('shipping_zip') and 'has-error' or ''} col-lg-6">
-                      <label class="control-label" for="shipping_zip">Zip / Postal Code</label>
+                      <label class="control-label" for="shipping_zip" style="font-weight: normal">Zip / Postal Code</label>
                       <input type="text" name="shipping_zip" class="form-control" t-att-value="checkout.get('shipping_zip', '')" t-att-readonly=" 'readonly' if shipping_id &gt;= 0 else ''"/>
                   </div>
                   <div t-attf-class="form-group #{error.get('shipping_country_id') and 'has-error' or ''} col-lg-6">