diff --git a/gaseous-server/ProcessQueue.cs b/gaseous-server/ProcessQueue.cs
index be9b1f9..dcff93d 100644
--- a/gaseous-server/ProcessQueue.cs
+++ b/gaseous-server/ProcessQueue.cs
@@ -17,6 +17,15 @@ namespace gaseous_server
                 _Interval = ExecutionInterval;
             }
 
+            public QueueItem(QueueItemType ItemType, int ExecutionInterval, List<QueueItemType> Blocks)
+            {
+                _ItemType = ItemType;
+                _ItemState = QueueItemState.NeverStarted;
+                _LastRunTime = DateTime.UtcNow.AddMinutes(ExecutionInterval);
+                _Interval = ExecutionInterval;
+                _Blocks = Blocks;
+            }
+
             private QueueItemType _ItemType = QueueItemType.NotConfigured;
             private QueueItemState _ItemState = QueueItemState.NeverStarted;
             private DateTime _LastRunTime = DateTime.UtcNow;
@@ -25,6 +34,7 @@ namespace gaseous_server
             private string _LastResult = "";
             private string? _LastError = null;
             private bool _ForceExecute = false;
+            private List<QueueItemType> _Blocks = new List<QueueItemType>();
 
             public QueueItemType ItemType => _ItemType;
             public QueueItemState ItemState => _ItemState;
@@ -40,6 +50,7 @@ namespace gaseous_server
             public string LastResult => _LastResult;
             public string? LastError => _LastError;
             public bool Force => _ForceExecute;
+            public List<QueueItemType> Blocks => _Blocks;
 
             public void Execute()
             {
diff --git a/gaseous-server/Program.cs b/gaseous-server/Program.cs
index 414d0cc..82181bf 100644
--- a/gaseous-server/Program.cs
+++ b/gaseous-server/Program.cs
@@ -65,8 +65,8 @@ var app = builder.Build();
 // Configure the HTTP request pipeline.
 //if (app.Environment.IsDevelopment())
 //{
-    app.UseSwagger();
-    app.UseSwaggerUI();
+app.UseSwagger();
+app.UseSwaggerUI();
 //}
 
 //app.UseHttpsRedirection();
@@ -92,10 +92,29 @@ gaseous_server.Classes.Metadata.Platforms.GetPlatform(0);
 
 // add background tasks
 ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(ProcessQueue.QueueItemType.SignatureIngestor, 60));
-ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(ProcessQueue.QueueItemType.TitleIngestor, 1));
+ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(
+    ProcessQueue.QueueItemType.TitleIngestor, 1,
+    new List<ProcessQueue.QueueItemType>
+    {
+        ProcessQueue.QueueItemType.OrganiseLibrary,
+        ProcessQueue.QueueItemType.LibraryScan
+    })
+    );
 ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(ProcessQueue.QueueItemType.MetadataRefresh, 360));
-ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(ProcessQueue.QueueItemType.OrganiseLibrary, 2040));
-ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(ProcessQueue.QueueItemType.LibraryScan, 30));
+ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(
+    ProcessQueue.QueueItemType.OrganiseLibrary, 2040, new List<ProcessQueue.QueueItemType>
+    {
+        ProcessQueue.QueueItemType.LibraryScan,
+        ProcessQueue.QueueItemType.TitleIngestor
+    })
+    );
+ProcessQueue.QueueItems.Add(new ProcessQueue.QueueItem(
+    ProcessQueue.QueueItemType.LibraryScan, 30, new List<ProcessQueue.QueueItemType>
+    {
+        ProcessQueue.QueueItemType.TitleIngestor,
+        ProcessQueue.QueueItemType.OrganiseLibrary
+    })
+    );
 
 // start the app
 app.Run();
diff --git a/gaseous-server/Timer.cs b/gaseous-server/Timer.cs
index 147898d..bbf8e1c 100644
--- a/gaseous-server/Timer.cs
+++ b/gaseous-server/Timer.cs
@@ -34,7 +34,7 @@ namespace gaseous_server
             //    "Timed Hosted Service is working. Count: {Count}", count);
 
             foreach (ProcessQueue.QueueItem qi in ProcessQueue.QueueItems) {
-                if (DateTime.UtcNow > qi.NextRunTime || qi.Force == true) {
+                if ((DateTime.UtcNow > qi.NextRunTime || qi.Force == true) && CheckProcessBlockList(qi) == true) {
                     qi.Execute();
                 }
             }
@@ -54,6 +54,26 @@ namespace gaseous_server
         {
             _timer?.Dispose();
         }
+
+        private bool CheckProcessBlockList(ProcessQueue.QueueItem queueItem)
+        {
+            if (queueItem.Blocks.Count > 0)
+            {
+                foreach (ProcessQueue.QueueItem qi in ProcessQueue.QueueItems)
+                {
+                    if (queueItem.Blocks.Contains(qi.ItemType) && qi.ItemState == ProcessQueue.QueueItemState.Running)
+                    {
+                        return false;
+                    }
+                }
+
+                return true;
+            }
+            else
+            {
+                return true;
+            }
+        }
     }
 }