diff --git a/app/playlistrow.py b/app/playlistrow.py
index ad44abb..ba3bb47 100644
--- a/app/playlistrow.py
+++ b/app/playlistrow.py
@@ -39,6 +39,7 @@ class FadeGraphGenerator(QObject):
         self.task_completed.emit()
 
 
+@singleton
 class FadegraphThreadController(QObject):
     def __init__(self):
         super().__init__()