diff --git a/Edge.MyMusic/src/Edge.MyMusic/Repositories/MusicInMemoryRepository.cs b/Edge.MyMusic/src/Edge.MyMusic/Repositories/MusicInMemoryRepository.cs
index 28d478e..c901ca1 100644
--- a/Edge.MyMusic/src/Edge.MyMusic/Repositories/MusicInMemoryRepository.cs
+++ b/Edge.MyMusic/src/Edge.MyMusic/Repositories/MusicInMemoryRepository.cs
@@ -9,7 +9,7 @@ namespace Edge.MyMusic.Repositories;
 
 internal class MusicInMemoryRepository : IMusicRepository
 {
-    private readonly static ConcurrentDictionary<string, MusicDocument> _datastore;
+    private readonly static IDictionary<string, MusicDocument> _datastore;
 
     static MusicInMemoryRepository()
     {
@@ -134,7 +134,7 @@ public Task<MusicDocument> AddMusicAsync(MusicDocument doc)
 
     public Task DeleteMusicAsync(string id)
     {
-        _datastore.Remove(id, out MusicDocument? _);
+        _datastore.Remove(id);
         return Task.CompletedTask;
     }