diff --git a/Emby.Server.Implementations/ApplicationHost.cs b/Emby.Server.Implementations/ApplicationHost.cs
index 0f1b24bbc..9d4964a9e 100644
--- a/Emby.Server.Implementations/ApplicationHost.cs
+++ b/Emby.Server.Implementations/ApplicationHost.cs
@@ -282,8 +282,6 @@ namespace Emby.Server.Implementations
 
         internal SqliteItemRepository ItemRepository { get; set; }
 
-        private IDeviceManager DeviceManager { get; set; }
-
         private IAuthenticationRepository AuthenticationRepository { get; set; }
 
         private ITVSeriesManager TVSeriesManager { get; set; }
@@ -735,8 +733,7 @@ namespace Emby.Server.Implementations
             TVSeriesManager = new TVSeriesManager(UserManager, UserDataManager, LibraryManager, ServerConfigurationManager);
             serviceCollection.AddSingleton(TVSeriesManager);
 
-            DeviceManager = new DeviceManager(AuthenticationRepository, JsonSerializer, LibraryManager, LocalizationManager, UserManager, FileSystemManager, LibraryMonitor, ServerConfigurationManager);
-            serviceCollection.AddSingleton(DeviceManager);
+            serviceCollection.AddSingleton<IDeviceManager, DeviceManager>();
 
             serviceCollection.AddSingleton<IMediaSourceManager, MediaSourceManager>();
 
diff --git a/Emby.Server.Implementations/Devices/DeviceManager.cs b/Emby.Server.Implementations/Devices/DeviceManager.cs
index adb8e793d..579cb895e 100644
--- a/Emby.Server.Implementations/Devices/DeviceManager.cs
+++ b/Emby.Server.Implementations/Devices/DeviceManager.cs
@@ -38,10 +38,11 @@ namespace Emby.Server.Implementations.Devices
         private readonly IServerConfigurationManager _config;
         private readonly ILibraryManager _libraryManager;
         private readonly ILocalizationManager _localizationManager;
-
         private readonly IAuthenticationRepository _authRepo;
+        private readonly Dictionary<string, ClientCapabilities> _capabilitiesCache;
 
         public event EventHandler<GenericEventArgs<Tuple<string, DeviceOptions>>> DeviceOptionsUpdated;
+
         public event EventHandler<GenericEventArgs<CameraImageUploadInfo>> CameraImageUploaded;
 
         private readonly object _cameraUploadSyncLock = new object();
@@ -65,10 +66,9 @@ namespace Emby.Server.Implementations.Devices
             _libraryManager = libraryManager;
             _localizationManager = localizationManager;
             _authRepo = authRepo;
+            _capabilitiesCache = new Dictionary<string, ClientCapabilities>(StringComparer.OrdinalIgnoreCase);
         }
 
-
-        private Dictionary<string, ClientCapabilities> _capabilitiesCache = new Dictionary<string, ClientCapabilities>(StringComparer.OrdinalIgnoreCase);
         public void SaveCapabilities(string deviceId, ClientCapabilities capabilities)
         {
             var path = Path.Combine(GetDevicePath(deviceId), "capabilities.json");