diff --git a/bin/server.dart b/bin/server.dart
index 2a35b73..3eacd3d 100644
--- a/bin/server.dart
+++ b/bin/server.dart
@@ -106,7 +106,7 @@ Future<void> _postOnMastodon(reqJson) async {
         options: dio_lib.Options(headers: {'Authorization': 'Bearer $authToken'}));
   } else {
     final mediaResponses = await Future.wait(
-        photoUrls.map((photoUrl) => dio.post('$instanceUrl/api/v1/media',
+        photoUrls.map((photoUrl) async => dio.post('$instanceUrl/api/v1/media',
             data: dio_lib.FormData.fromMap({'file': File(photoUrl)}),
             options: dio_lib.Options(headers: {'Authorization': 'Bearer $authToken'}))));