diff --git a/lib/logic/cubit/backups/backups_cubit.dart b/lib/logic/cubit/backups/backups_cubit.dart
index 16a90e54..4bee9ea8 100644
--- a/lib/logic/cubit/backups/backups_cubit.dart
+++ b/lib/logic/cubit/backups/backups_cubit.dart
@@ -86,7 +86,7 @@ class BackupsCubit extends AppConfigDependendCubit<BackupsState> {
   Future<void> createBucket() async {
     emit(state.copyWith(preventActions: true));
     final domain =
-        appConfigCubit.state.cloudFlareDomain!.domainName.replaceAll('.', '-');
+        appConfigCubit.state.cloudFlareDomain!.domainName.replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-');
     final serverId = appConfigCubit.state.hetznerServer!.id;
     var bucketName = 'selfprivacy-$domain-$serverId';
     // If bucket name is too long, shorten it