1 files changed, 2 insertions, 1 deletions

diff --git a/music_sampler/app_blocks/playlist.py b/music_sampler/app_blocks/playlist.py
index 5894995..706e4fc 100644
--- a/music_sampler/app_blocks/playlist.py
+++ b/music_sampler/app_blocks/playlist.py
@@ -2,7 +2,7 @@ from kivy.uix.label import Label
 from kivy.uix.stacklayout import StackLayout
 from kivy.uix.relativelayout import RelativeLayout
 from kivy.properties import ListProperty
-from kivy.clock import Clock
+from kivy.clock import Clock, mainthread
 from ..helpers import duration_to_min_sec
 from ..lock import Lock
 
@@ -20,6 +20,7 @@ class PlayList(RelativeLayout):
         super(PlayList, self).__init__(**kwargs)
         Clock.schedule_interval(self.update_playlist, 0.5)
 
+    @mainthread
     def update_playlist(self, dt):
         if self.parent is None or 'Mapping' not in self.parent.ids:
             return True