diff --git a/src/core/__init__.py b/src/core/__init__.py
index f8e65f7..ce62b38 100644
--- a/src/core/__init__.py
+++ b/src/core/__init__.py
@@ -135,8 +135,8 @@ def build_usps_rate_request(weight, container, zip_destination):
             'service': ShippingService.PRIORITY_COMMERCIAL,
             'zip_origination': settings.DEFAULT_ZIP_ORIGINATION,
             'zip_destination': zip_destination,
-            'pounds': '0',
-            'ounces': weight,
+            'pounds': weight,
+            'ounces': '0',
             'container': container,
             'width': '',
             'length': '',