diff --git a/worker.py b/worker.py
index 397d065..a15e3f7 100644
--- a/worker.py
+++ b/worker.py
@@ -27,7 +27,7 @@ jobs = Queue()
 
 langcnt = {}
 
-lasttask = datetime.min()
+lasttask = datetime.min
 
 try:
     mkdir("out")