diff --git a/src/Bugsnag/ThreadQueueDelivery.cs b/src/Bugsnag/ThreadQueueDelivery.cs
index 51863bc..5bb46e5 100644
--- a/src/Bugsnag/ThreadQueueDelivery.cs
+++ b/src/Bugsnag/ThreadQueueDelivery.cs
@@ -60,7 +60,7 @@ public class ThreadQueueDelivery : IDelivery
     private ThreadQueueDelivery()
     {
       _queue = new BlockingQueue<IPayload>();
-      _worker = new Thread(new ThreadStart(ProcessQueue));
+      _worker = new Thread(new ThreadStart(ProcessQueue)) { IsBackground = true };
       _worker.Start();
     }