diff --git a/openant/fs/manager.py b/openant/fs/manager.py
index 2d76396..495f560 100644
--- a/openant/fs/manager.py
+++ b/openant/fs/manager.py
@@ -332,7 +332,7 @@ def download_directory(self, callback=None):
         data = self.download(0, callback)
         return Directory.parse(data)
 
-    def set_time(self, time=datetime.datetime.utcnow()):
+    def set_time(self, time=datetime.datetime.now(datetime.UTC)):
         """
         :param time: datetime in UTC, or None to set to current time
         """