diff --git a/src/stores/customer/index.ts b/src/stores/customer/index.ts
index 7d13fcfd..5a816625 100644
--- a/src/stores/customer/index.ts
+++ b/src/stores/customer/index.ts
@@ -219,7 +219,7 @@ const useCustomerStore = defineStore('api-customer', () => {
       `/customer-branch/${opts.branchId}/attachment/${opts.filename || opts.file.name}`,
       opts.file,
       {
-        headers: { 'X-Rtid': flowStore.rtid },
+        headers: { 'X-Rtid': flowStore.rtid, 'Content-Type': opts.file.type },
         onUploadProgress: (e) => console.log(e),
       },
     );