diff --git a/src/helpers/heritage-integration/order-helper.js b/src/helpers/heritage-integration/order-helper.js
index b18b64a85..d64ab865d 100644
--- a/src/helpers/heritage-integration/order-helper.js
+++ b/src/helpers/heritage-integration/order-helper.js
@@ -38,10 +38,10 @@ export async function saveOrder() {
 
     // Save the referral information back from the store.
     await baseMixin.methods.dispatchStoreAction(storeActions.SET_REFERRAL_INFORMATION, {
-        referralNumber: savedOrderInfo.data.referralNumber,
+        referralNumber: savedOrderInfo.data.referralNumber.toString(),
         referralCorrelationId: savedOrderInfo.data.referralCorrelationId,
         referralDate: savedOrderInfo.data.referralDate,
-        accountNumber: savedOrderInfo.data.accountNumber
+        accountNumber: savedOrderInfo.data.accountNumber.toString()
     }, false);
 
     // Update the cookie with the referral information when saved.