diff --git a/lib/utils/accounts/account_manager/account_mgr.dart b/lib/utils/accounts/account_manager/account_mgr.dart
index b0a2be1f..e601d9ae 100644
--- a/lib/utils/accounts/account_manager/account_mgr.dart
+++ b/lib/utils/accounts/account_manager/account_mgr.dart
@@ -132,7 +132,7 @@ class AccountManager extends Interceptor {
           ...cookies,
         ]);
         options.headers[HttpHeaders.cookieHeader] =
-            newCookies.isNotEmpty ? newCookies : null;
+            newCookies.isNotEmpty ? newCookies : '';
         handler.next(options);
       }).catchError((dynamic e, StackTrace s) {
         final err = DioException(