diff --git a/asdf/asdf.py b/asdf/asdf.py
index 0ea3b45ef..ac6da11e1 100644
--- a/asdf/asdf.py
+++ b/asdf/asdf.py
@@ -1336,8 +1336,9 @@ def add_history_entry(self, description, software=None):
         elif software is not None:
             software = Software(software)
 
-        time_ = datetime.datetime.utcfromtimestamp(
+        time_ = datetime.datetime.fromtimestamp(
             int(os.environ.get("SOURCE_DATE_EPOCH", time.time())),
+            datetime.timezone.utc
         )
 
         entry = HistoryEntry(