diff --git a/lib/provider/server/routes/playback.dart b/lib/provider/server/routes/playback.dart
index ef64481c..db6bf8f5 100644
--- a/lib/provider/server/routes/playback.dart
+++ b/lib/provider/server/routes/playback.dart
@@ -2,7 +2,6 @@ import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
-import 'package:collection/collection.dart';
 import 'package:dio/dio.dart' hide Response;
 import 'package:dio/dio.dart' as dio_lib;
 import 'package:flutter/foundation.dart';
diff --git a/pubspec.lock b/pubspec.lock
index 9c423d76..f47f35cb 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1198,7 +1198,7 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "577ad115dce0514afc53e2b3ab7b96bcd88d3be3"
+      resolved-ref: "401fde426339cf8f1e00dee22cc95f64c3e60053"
       url: "https://github.com/hetu-community/hetu_std.git"
     source: git
     version: "1.0.0"