diff --git a/backend/guide_export.py b/backend/guide_export.py
index 484f13a..6840644 100644
--- a/backend/guide_export.py
+++ b/backend/guide_export.py
@@ -355,7 +355,7 @@ def _export_footer(lang: str) -> str:
     template = loc.get("guide105.export_footer", "")
     if "%s" not in template and "{" not in template:
         template = "ObsiGate {version}"
-    today = datetime.datetime.now(tz=datetime.timezone.utc).date().isoformat()
+    today = datetime.datetime.now(tz=datetime.UTC).date().isoformat()
     return _collapse(template).format(version=_app_version(), date=today)