diff --git a/API/Controllers/Requests/PatchLibraryRefreshRecord.cs b/API/Controllers/Requests/PatchLibraryRefreshRecord.cs
new file mode 100644
index 0000000..6e2182f
--- /dev/null
+++ b/API/Controllers/Requests/PatchLibraryRefreshRecord.cs
@@ -0,0 +1,21 @@
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using API.Workers;
+
+namespace API.Controllers.Requests;
+
+public record PatchLibraryRefreshRecord
+{
+    /// <summary>
+    /// When to refresh the Library
+    /// </summary>
+    [Required]
+    [Description("When to refresh the Library")]
+    public required LibraryRefreshSetting Setting { get; init; }
+    
+    /// <summary>
+    /// When <see cref="LibraryRefreshSetting.WhileDownloading"/> is selected, update the time between refreshes
+    /// </summary>
+    [Description("When WhileDownloadingis selected, update the time between refreshes")]
+    public int? RefreshLibraryWhileDownloadingEveryMinutes { get; init; }
+}
\ No newline at end of file
diff --git a/API/Controllers/SettingsController.cs b/API/Controllers/SettingsController.cs
index c7c9d05..fce6d47 100644
--- a/API/Controllers/SettingsController.cs
+++ b/API/Controllers/SettingsController.cs
@@ -1,4 +1,5 @@
-using API.MangaDownloadClients;
+using API.Controllers.Requests;
+using API.MangaDownloadClients;
 using Asp.Versioning;
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
@@ -290,4 +291,19 @@ public class SettingsController() : Controller
         Tranga.Settings.SetDownloadLanguage(Language);
         return TypedResults.Ok();
     }
+    
+
+    /// <summary>
+    /// Sets the time when Libraries are refreshed
+    /// </summary>
+    /// <response code="200"></response>
+    [HttpPatch("LibraryRefresh")]
+    [ProducesResponseType(Status200OK)]
+    public Ok SetLibraryRefresh([FromBody]PatchLibraryRefreshRecord requestData)
+    {
+        Tranga.Settings.SetLibraryRefreshSetting(requestData.Setting);
+        if(requestData.RefreshLibraryWhileDownloadingEveryMinutes is { } value)
+            Tranga.Settings.SetRefreshLibraryWhileDownloadingEveryMinutes(value);
+        return TypedResults.Ok();
+    }
 }
\ No newline at end of file
diff --git a/API/Schema/LibraryContext/LibraryConnectors/LibraryConnector.cs b/API/Schema/LibraryContext/LibraryConnectors/LibraryConnector.cs
index f25e551..f332bfa 100644
--- a/API/Schema/LibraryContext/LibraryConnectors/LibraryConnector.cs
+++ b/API/Schema/LibraryContext/LibraryConnectors/LibraryConnector.cs
@@ -2,6 +2,8 @@
 using System.ComponentModel.DataAnnotations.Schema;
 using log4net;
 using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 
 namespace API.Schema.LibraryContext.LibraryConnectors;
 
@@ -40,8 +42,16 @@ public abstract class LibraryConnector : Identifiable
     internal abstract Task<bool> Test(CancellationToken ct);
 }
 
+[JsonConverter(typeof(StringEnumConverter))]
 public enum LibraryType : byte
 {
+    /// <summary>
+    /// <seealso cref="Komga"/>
+    /// </summary>
     Komga = 0,
+    
+    /// <summary>
+    /// <seealso cref="Kavita"/>
+    /// </summary>
     Kavita = 1
 }
\ No newline at end of file
diff --git a/API/Schema/MangaContext/Manga.cs b/API/Schema/MangaContext/Manga.cs
index 8a694de..753e569 100644
--- a/API/Schema/MangaContext/Manga.cs
+++ b/API/Schema/MangaContext/Manga.cs
@@ -1,13 +1,10 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Runtime.InteropServices;
-using System.Text;
 using API.Workers;
 using Microsoft.EntityFrameworkCore;
-using SixLabors.ImageSharp;
-using SixLabors.ImageSharp.Formats.Jpeg;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using static System.IO.UnixFileMode;
 
 namespace API.Schema.MangaContext;
@@ -138,6 +135,7 @@ public class Manga : Identifiable
     public override string ToString() => $"{base.ToString()} {Name}";
 }
 
+[JsonConverter(typeof(StringEnumConverter))]
 public enum MangaReleaseStatus : byte
 {
     Continuing = 0,
diff --git a/API/Schema/NotificationsContext/Notification.cs b/API/Schema/NotificationsContext/Notification.cs
index 0ea5a75..ae4e84e 100644
--- a/API/Schema/NotificationsContext/Notification.cs
+++ b/API/Schema/NotificationsContext/Notification.cs
@@ -1,5 +1,7 @@
 using System.ComponentModel.DataAnnotations;
 using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 
 namespace API.Schema.NotificationsContext;
 
@@ -48,6 +50,7 @@ public class Notification : Identifiable
     public override string ToString() => $"{base.ToString()} {Urgency} {Title} {Message}";
 }
 
+[JsonConverter(typeof(StringEnumConverter))]
 public enum NotificationUrgency : byte
 {
     Low = 1,
diff --git a/API/Tranga.cs b/API/Tranga.cs
index de6563f..f9561c9 100644
--- a/API/Tranga.cs
+++ b/API/Tranga.cs
@@ -146,25 +146,27 @@ public static class Tranga
     private static Action DefaultAfterWork(BaseWorker worker, Action? callback = null) => () =>
     {
         Log.Debug($"DefaultAfterWork {worker}");
-        if (RunningWorkers.TryGetValue(worker, out Task<BaseWorker[]>? task))
+        try
         {
-            Log.Debug($"Waiting for Children to exit {worker}");
-            task.Wait();
-            if (task.IsCompleted)
+            if (RunningWorkers.TryGetValue(worker, out Task<BaseWorker[]>? task))
             {
-                try
+                Log.Debug($"Waiting for Children to exit {worker}");
+                task.Wait();
+                if (task.IsCompleted)
                 {
+                    Log.Debug($"Children done {worker}");
                     BaseWorker[] newWorkers = task.Result;
                     Log.Debug($"{worker} created {newWorkers.Length} new Workers.");
                     AddWorkers(newWorkers);
-                }
-                catch (Exception e)
-                {
-                    Log.Error(e);
-                }
-            }else Log.Warn($"Children failed: {worker}");
+                }else
+                    Log.Warn($"Children failed: {worker}");
+            }
+            RunningWorkers.Remove(worker, out _);
+        }
+        catch (Exception e)
+        {
+            Log.Error(e);
         }
-        RunningWorkers.Remove(worker, out _);
         callback?.Invoke();
     };
 
diff --git a/API/TrangaSettings.cs b/API/TrangaSettings.cs
index bcbbe44..7b205e4 100644
--- a/API/TrangaSettings.cs
+++ b/API/TrangaSettings.cs
@@ -1,6 +1,8 @@
 using System.Runtime.InteropServices;
 using API.MangaDownloadClients;
+using API.Workers;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 
 namespace API;
 
@@ -54,16 +56,20 @@ public struct TrangaSettings()
 
     public int MaxConcurrentWorkers { get; set; } = Math.Max(Environment.ProcessorCount, 4); // Minimum of 4 Tasks, maximum of 1 per Core
 
+    public LibraryRefreshSetting LibraryRefreshSetting { get; set; } = LibraryRefreshSetting.AfterMangaFinished;
+
+    public int RefreshLibraryWhileDownloadingEveryMinutes { get; set; } = 10; 
+
     public static TrangaSettings Load()
     {
         if (!File.Exists(SettingsFilePath))
             new TrangaSettings().Save();
-        return JsonConvert.DeserializeObject<TrangaSettings>(File.ReadAllText(SettingsFilePath));
+        return JsonConvert.DeserializeObject<TrangaSettings>(File.ReadAllText(SettingsFilePath), new StringEnumConverter());
     }
 
     public void Save()
     {
-        File.WriteAllText(SettingsFilePath, JsonConvert.SerializeObject(this, Formatting.Indented));
+        File.WriteAllText(SettingsFilePath, JsonConvert.SerializeObject(this, Formatting.Indented, new StringEnumConverter()));
     }
 
     public void SetUserAgent(string value)
@@ -125,4 +131,16 @@ public struct TrangaSettings()
         this.MaxConcurrentWorkers = value;
         Save();
     }
+
+    public void SetLibraryRefreshSetting(LibraryRefreshSetting setting)
+    {
+        this.LibraryRefreshSetting = setting;
+        Save();
+    }
+
+    public void SetRefreshLibraryWhileDownloadingEveryMinutes(int value)
+    {
+        this.RefreshLibraryWhileDownloadingEveryMinutes = value;
+        Save();
+    }
 }
\ No newline at end of file
diff --git a/API/Workers/BaseWorker.cs b/API/Workers/BaseWorker.cs
index 58a2d5b..1208e84 100644
--- a/API/Workers/BaseWorker.cs
+++ b/API/Workers/BaseWorker.cs
@@ -1,5 +1,7 @@
 using API.Schema;
 using log4net;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 
 namespace API.Workers;
 
@@ -116,6 +118,7 @@ public abstract class BaseWorker : Identifiable
     }
 }
 
+[JsonConverter(typeof(StringEnumConverter))]
 public enum WorkerExecutionState
 {
     Failed = 0,
diff --git a/API/Workers/MangaDownloadWorkers/DownloadChapterFromMangaconnectorWorker.cs b/API/Workers/MangaDownloadWorkers/DownloadChapterFromMangaconnectorWorker.cs
index c03a6b5..f80214f 100644
--- a/API/Workers/MangaDownloadWorkers/DownloadChapterFromMangaconnectorWorker.cs
+++ b/API/Workers/MangaDownloadWorkers/DownloadChapterFromMangaconnectorWorker.cs
@@ -3,6 +3,7 @@ using System.Runtime.InteropServices;
 using API.MangaConnectors;
 using API.MangaDownloadClients;
 using API.Schema.MangaContext;
+using API.Workers.PeriodicWorkers;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 using SixLabors.ImageSharp;
@@ -21,16 +22,16 @@ namespace API.Workers.MangaDownloadWorkers;
 public class DownloadChapterFromMangaconnectorWorker(MangaConnectorId<Chapter> chId, IEnumerable<BaseWorker>? dependsOn = null)
     : BaseWorkerWithContext<MangaContext>(dependsOn)
 {
-    internal readonly string MangaConnectorIdId = chId.Key;
+    private readonly string _mangaConnectorIdId = chId.Key;
     protected override async Task<BaseWorker[]> DoWorkInternal()
     {
-        Log.Debug($"Downloading chapter for MangaConnectorId {MangaConnectorIdId}...");
+        Log.Debug($"Downloading chapter for MangaConnectorId {_mangaConnectorIdId}...");
         // Getting MangaConnector info
         if (await DbContext.MangaConnectorToChapter
                 .Include(id => id.Obj)
                 .ThenInclude(c => c.ParentManga)
                 .ThenInclude(m => m.Library)
-                .FirstOrDefaultAsync(c => c.Key == MangaConnectorIdId, CancellationToken) is not { } mangaConnectorId)
+                .FirstOrDefaultAsync(c => c.Key == _mangaConnectorIdId, CancellationToken) is not { } mangaConnectorId)
         {
             Log.Error("Could not get MangaConnectorId.");
             return []; //TODO Exception?
@@ -137,8 +138,22 @@ public class DownloadChapterFromMangaconnectorWorker(MangaConnectorId<Chapter> c
         
         Log.Debug($"Downloaded chapter {chapter}.");
 
-        return [];
+        bool refreshLibrary = await CheckLibraryRefresh();
+        if(refreshLibrary)
+            Log.Info($"Condition {Tranga.Settings.LibraryRefreshSetting} met.");
+
+        return refreshLibrary? [new RefreshLibrariesWorker()] : [];
     }
+
+    private async Task<bool> CheckLibraryRefresh() => Tranga.Settings.LibraryRefreshSetting switch
+    {
+        LibraryRefreshSetting.AfterAllFinished => await AllDownloadsFinished(),
+        LibraryRefreshSetting.AfterMangaFinished => await DbContext.MangaConnectorToChapter.Include(chId => chId.Obj).Where(chId => chId.UseForDownload).AllAsync(chId => chId.Obj.Downloaded, CancellationToken),
+        LibraryRefreshSetting.AfterEveryChapter => true,
+        LibraryRefreshSetting.WhileDownloading => await AllDownloadsFinished() ||  DateTime.UtcNow.Subtract(RefreshLibrariesWorker.LastRefresh).TotalMinutes > Tranga.Settings.RefreshLibraryWhileDownloadingEveryMinutes,
+        _ => true
+    };
+    private async Task<bool> AllDownloadsFinished() => (await StartNewChapterDownloadsWorker.GetMissingChapters(DbContext, CancellationToken)).Count == 0;
     
     private void ProcessImage(string imagePath)
     {
@@ -232,5 +247,5 @@ public class DownloadChapterFromMangaconnectorWorker(MangaConnectorId<Chapter> c
         return true;
     }
 
-    public override string ToString() => $"{base.ToString()} {MangaConnectorIdId}";
+    public override string ToString() => $"{base.ToString()} {_mangaConnectorIdId}";
 }
\ No newline at end of file
diff --git a/API/Workers/PeriodicWorkers/StartNewChapterDownloadsWorker.cs b/API/Workers/PeriodicWorkers/StartNewChapterDownloadsWorker.cs
index 05d386a..3aef412 100644
--- a/API/Workers/PeriodicWorkers/StartNewChapterDownloadsWorker.cs
+++ b/API/Workers/PeriodicWorkers/StartNewChapterDownloadsWorker.cs
@@ -18,10 +18,7 @@ public class StartNewChapterDownloadsWorker(TimeSpan? interval = null, IEnumerab
         Log.Debug("Checking for missing chapters...");
         
         // Get missing chapters
-        List<MangaConnectorId<Chapter>> missingChapters = await DbContext.MangaConnectorToChapter
-            .Include(id => id.Obj)
-            .Where(id => id.Obj.Downloaded == false && id.UseForDownload)
-            .ToListAsync(CancellationToken);
+        List<MangaConnectorId<Chapter>> missingChapters = await GetMissingChapters(DbContext, CancellationToken);
         
         Log.Debug($"Found {missingChapters.Count} missing downloads.");
         
@@ -37,4 +34,9 @@ public class StartNewChapterDownloadsWorker(TimeSpan? interval = null, IEnumerab
         
         return newWorkers.ToArray();
     }
+    
+    internal static async Task<List<MangaConnectorId<Chapter>>> GetMissingChapters(MangaContext ctx, CancellationToken cancellationToken) => await ctx.MangaConnectorToChapter
+        .Include(id => id.Obj)
+        .Where(id => id.Obj.Downloaded == false && id.UseForDownload)
+        .ToListAsync(cancellationToken);
 }
\ No newline at end of file
diff --git a/API/Workers/RefreshLibrariesWorker.cs b/API/Workers/RefreshLibrariesWorker.cs
new file mode 100644
index 0000000..0167afb
--- /dev/null
+++ b/API/Workers/RefreshLibrariesWorker.cs
@@ -0,0 +1,44 @@
+using API.Schema.LibraryContext;
+using API.Schema.LibraryContext.LibraryConnectors;
+using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace API.Workers;
+
+public class RefreshLibrariesWorker(IEnumerable<BaseWorker>? dependsOn = null) : BaseWorkerWithContext<LibraryContext>(dependsOn)
+{
+    public static DateTime LastRefresh { get; set; } = DateTime.UnixEpoch;
+    
+    protected override async Task<BaseWorker[]> DoWorkInternal()
+    {
+        Log.Debug("Refreshing libraries...");
+        LastRefresh = DateTime.UtcNow;
+        List<LibraryConnector> libraries = await DbContext.LibraryConnectors.ToListAsync(CancellationToken);
+        foreach (LibraryConnector connector in libraries)
+            await connector.UpdateLibrary(CancellationToken);
+        Log.Debug("Libraries Refreshed...");
+        return [];
+    }
+}
+
+[JsonConverter(typeof(StringEnumConverter))]
+public enum LibraryRefreshSetting : byte
+{
+    /// <summary>
+    /// Refresh Libraries after all Manga are downloaded
+    /// </summary>
+    AfterAllFinished = 0,
+    /// <summary>
+    /// Refresh Libraries after a Manga is downloaded
+    /// </summary>
+    AfterMangaFinished = 1,
+    /// <summary>
+    /// Refresh Libraries after every download
+    /// </summary>
+    AfterEveryChapter = 2,
+    /// <summary>
+    /// Refresh Libraries while downloading chapters, every x minutes
+    /// </summary>
+    WhileDownloading = 3
+}
\ No newline at end of file
diff --git a/Tranga.sln.DotSettings b/Tranga.sln.DotSettings
index 718e87a..f95497a 100644
--- a/Tranga.sln.DotSettings
+++ b/Tranga.sln.DotSettings
@@ -8,6 +8,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=kitsu/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Komga/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=lunasea/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=mangaconnector/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=mangakatana/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Manganato/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Mangasee/@EntryIndexedValue">True</s:Boolean>
@@ -15,4 +16,5 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Ntfy/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=solverr/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Taskmanager/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=Tranga/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Tranga/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=trangatemp/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file