diff --git a/install/helioviewer/hvpull/servers/iris.py b/install/helioviewer/hvpull/servers/iris.py
index cf8769644..4092755e1 100644
--- a/install/helioviewer/hvpull/servers/iris.py
+++ b/install/helioviewer/hvpull/servers/iris.py
@@ -49,4 +49,4 @@ def get_datetime_from_file(self, filename):
 
     def get_starttime(self):
         """Default start time to use when retrieving data"""
-        return datetime.datetime.utcnow() - datetime.timedelta(days=3)
+        return datetime.now(datetime.timezone.utc) - timedelta(days=3)