diff --git a/lazy_player/thumbnailer.py b/lazy_player/thumbnailer.py
index f30966f..417e24b 100644
--- a/lazy_player/thumbnailer.py
+++ b/lazy_player/thumbnailer.py
@@ -50,7 +50,7 @@ class Thumbnailer(ThreadPoolExecutor):
 
 
 def generate_thumbnail_sync_nicely(file_item: FileItem):
-    os.nice(19)
+    os.nice(10)
     return generate_thumbnail_sync(file_item)