diff --git a/gotify_tray/gotify/models.py b/gotify_tray/gotify/models.py
index 2a25a40..4a98c3b 100644
--- a/gotify_tray/gotify/models.py
+++ b/gotify_tray/gotify/models.py
@@ -47,12 +47,15 @@ class GotifyMessageModel(AttributeDict):
     title: Optional[str] = None
 
     def __init__(self, d: dict, *args, **kwargs):
+        s = (
+            d["date"].split(".")[0]  # date
+            + "."
+            + d["date"].split(".")[1][:6]  # ms
+            + "+"
+            + d["date"].split("+")[-1]  # timezone
+        )
         d.update(
-            {
-                "date": datetime.datetime.fromisoformat(
-                    d["date"].split(".")[0] + ".000000+" + d["date"].split("+")[-1]
-                ).astimezone(local_timezone)
-            }
+            {"date": datetime.datetime.fromisoformat(s).astimezone(local_timezone)}
         )
         super(GotifyMessageModel, self).__init__(d, *args, **kwargs)