diff --git a/src/modules/parcel-sync/services/epay-client.ts b/src/modules/parcel-sync/services/epay-client.ts
index 5fd2084..8674210 100644
--- a/src/modules/parcel-sync/services/epay-client.ts
+++ b/src/modules/parcel-sync/services/epay-client.ts
@@ -19,7 +19,6 @@ import axios, { type AxiosInstance } from "axios";
 import crypto from "crypto";
 import { wrapper } from "axios-cookiejar-support";
 import { CookieJar } from "tough-cookie";
-import FormData from "form-data";
 import type {
   EpayCartResponse,
   EpaySearchResult,
@@ -400,16 +399,18 @@ export class EpayClient {
       configurationUrl: "http://www.google.com",
     };
 
-    const form = new FormData();
-    form.append("reqType", "saveProductMetadataForBasketItem");
-    form.append("productMetadataJSON", JSON.stringify(metadata));
+    // Use URLSearchParams instead of multipart FormData
+    // (axios + cookie-jar has issues with native FormData)
+    const form = new URLSearchParams();
+    form.set("reqType", "saveProductMetadataForBasketItem");
+    form.set("productMetadataJSON", JSON.stringify(metadata));
 
     const response = await this.client.post(
       `${BASE_URL}/EpayJsonInterceptor.action`,
-      form,
+      form.toString(),
       {
         headers: {
-          ...form.getHeaders(),
+          "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
           "X-Requested-With": "XMLHttpRequest",
         },
         timeout: DEFAULT_TIMEOUT_MS,