diff --git a/osu.Game/Beatmaps/BeatmapManager.cs b/osu.Game/Beatmaps/BeatmapManager.cs
index b48ab6112e..4c75069f08 100644
--- a/osu.Game/Beatmaps/BeatmapManager.cs
+++ b/osu.Game/Beatmaps/BeatmapManager.cs
@@ -57,7 +57,7 @@ namespace osu.Game.Beatmaps
         /// </summary>
         public readonly WorkingBeatmap DefaultBeatmap;
 
-        public override string[] HandledExtensions => new[] { ".osz" };
+        public override IEnumerable<string> HandledExtensions => new[] { ".osz" };
 
         protected override string[] HashableFileTypes => new[] { ".osu" };
 
diff --git a/osu.Game/Database/ArchiveModelManager.cs b/osu.Game/Database/ArchiveModelManager.cs
index bbe2604216..3292936f5f 100644
--- a/osu.Game/Database/ArchiveModelManager.cs
+++ b/osu.Game/Database/ArchiveModelManager.cs
@@ -70,7 +70,7 @@ namespace osu.Game.Database
 
         private readonly Bindable<WeakReference<TModel>> itemRemoved = new Bindable<WeakReference<TModel>>();
 
-        public virtual string[] HandledExtensions => new[] { ".zip" };
+        public virtual IEnumerable<string> HandledExtensions => new[] { ".zip" };
 
         public virtual bool SupportsImportFromStable => RuntimeInfo.IsDesktop;
 
diff --git a/osu.Game/Database/ICanAcceptFiles.cs b/osu.Game/Database/ICanAcceptFiles.cs
index b9f882468d..e4d92d957c 100644
--- a/osu.Game/Database/ICanAcceptFiles.cs
+++ b/osu.Game/Database/ICanAcceptFiles.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace osu.Game.Database
@@ -19,6 +20,6 @@ namespace osu.Game.Database
         /// <summary>
         /// An array of accepted file extensions (in the standard format of ".abc").
         /// </summary>
-        string[] HandledExtensions { get; }
+        IEnumerable<string> HandledExtensions { get; }
     }
 }
diff --git a/osu.Game/OsuGameBase.cs b/osu.Game/OsuGameBase.cs
index dfda0d0118..f61ff43ca9 100644
--- a/osu.Game/OsuGameBase.cs
+++ b/osu.Game/OsuGameBase.cs
@@ -366,7 +366,7 @@ namespace osu.Game
             }
         }
 
-        public string[] HandledExtensions => fileImporters.SelectMany(i => i.HandledExtensions).ToArray();
+        public IEnumerable<string> HandledExtensions => fileImporters.SelectMany(i => i.HandledExtensions);
 
         protected override void Dispose(bool isDisposing)
         {
diff --git a/osu.Game/Scoring/ScoreManager.cs b/osu.Game/Scoring/ScoreManager.cs
index 8e8147ff39..5a6da53839 100644
--- a/osu.Game/Scoring/ScoreManager.cs
+++ b/osu.Game/Scoring/ScoreManager.cs
@@ -27,7 +27,7 @@ namespace osu.Game.Scoring
 {
     public class ScoreManager : DownloadableArchiveModelManager<ScoreInfo, ScoreFileInfo>
     {
-        public override string[] HandledExtensions => new[] { ".osr" };
+        public override IEnumerable<string> HandledExtensions => new[] { ".osr" };
 
         protected override string[] HashableFileTypes => new[] { ".osr" };
 
diff --git a/osu.Game/Skinning/SkinManager.cs b/osu.Game/Skinning/SkinManager.cs
index ee4b7bc8e7..7af400e807 100644
--- a/osu.Game/Skinning/SkinManager.cs
+++ b/osu.Game/Skinning/SkinManager.cs
@@ -33,7 +33,7 @@ namespace osu.Game.Skinning
         public readonly Bindable<Skin> CurrentSkin = new Bindable<Skin>(new DefaultSkin());
         public readonly Bindable<SkinInfo> CurrentSkinInfo = new Bindable<SkinInfo>(SkinInfo.Default) { Default = SkinInfo.Default };
 
-        public override string[] HandledExtensions => new[] { ".osk" };
+        public override IEnumerable<string> HandledExtensions => new[] { ".osk" };
 
         protected override string[] HashableFileTypes => new[] { ".ini" };