diff --git a/worker.py b/worker.py
index 27501a4..700768d 100644
--- a/worker.py
+++ b/worker.py
@@ -14,7 +14,7 @@ tempdir = config.getTempDir()
 if not tempdir.exists():
     tempdir.mkdir()
 
-elif not tempdir.isdir():
+elif not tempdir.is_dir():
     raise ValueError(f"Temp Dir {str(tempdir)} exists and is not a directory.")
 
 messages = []