diff --git a/Tranga/TrangaTask.cs b/Tranga/TrangaTask.cs
index 6dbf0d1..6c90544 100644
--- a/Tranga/TrangaTask.cs
+++ b/Tranga/TrangaTask.cs
@@ -12,7 +12,6 @@ namespace Tranga;
 /// Stores information on Task, when implementing new Tasks also update the serializer
 /// </summary>
 [JsonDerivedType(typeof(MonitorPublicationTask), 2)]
-[JsonDerivedType(typeof(UpdateLibrariesTask), 3)]
 [JsonDerivedType(typeof(DownloadChapterTask), 4)]
 public abstract class TrangaTask
 {
@@ -131,19 +130,19 @@ public abstract class TrangaTask
             return objectType == typeof(TrangaTask);
         }
 
-        public override object ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
+        public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
         {
             JObject jo = JObject.Load(reader);
             if (jo["task"]!.Value<Int64>() == (Int64)Task.MonitorPublication)
                 return jo.ToObject<MonitorPublicationTask>(serializer)!;
 
             if (jo["task"]!.Value<Int64>() == (Int64)Task.UpdateLibraries)
-                return jo.ToObject<UpdateLibrariesTask>(serializer)!;
+                return null;
             
             if (jo["task"]!.Value<Int64>() == (Int64)Task.DownloadChapter)
                 return jo.ToObject<DownloadChapterTask>(serializer)!;
 
-            throw new Exception();
+            throw new Exception($"Deserialization: Unknown type {objectType} for TrangaTask");
         }
 
         public override bool CanWrite => false;
diff --git a/Tranga/TrangaTasks/UpdateLibrariesTask.cs b/Tranga/TrangaTasks/UpdateLibrariesTask.cs
deleted file mode 100644
index 2ecf6f2..0000000
--- a/Tranga/TrangaTasks/UpdateLibrariesTask.cs
+++ /dev/null
@@ -1,33 +0,0 @@
-using System.Net;
-using Logging;
-
-namespace Tranga.TrangaTasks;
-
-/// <summary>
-/// LEGACY DEPRECATED
-/// </summary>
-public class UpdateLibrariesTask : TrangaTask
-{
-    public UpdateLibrariesTask(TimeSpan reoccurrence) : base(Task.UpdateLibraries, reoccurrence)
-    {
-    }
-
-    protected override HttpStatusCode ExecuteTask(TaskManager taskManager, Logger? logger, CancellationToken? cancellationToken = null)
-    {
-        if (cancellationToken?.IsCancellationRequested ?? false)
-            return HttpStatusCode.RequestTimeout;
-        foreach(LibraryManager lm in taskManager.settings.libraryManagers)
-            lm.UpdateLibrary();
-        return HttpStatusCode.OK;
-    }
-
-    public override TrangaTask Clone()
-    {
-        return new UpdateLibrariesTask(this.reoccurrence);
-    }
-
-    protected override double GetProgress()
-    {
-        return 1;
-    }
-}
\ No newline at end of file