diff --git a/backend/routers/ical_router.py b/backend/routers/ical_router.py
index b10ad04..9a35ca7 100644
--- a/backend/routers/ical_router.py
+++ b/backend/routers/ical_router.py
@@ -50,6 +50,7 @@ def _fetch_ics(url: str) -> str:
     try:
         resp = http_requests.get(url, timeout=30, allow_redirects=True)
         resp.raise_for_status()
+        resp.encoding = 'utf-8'
         return resp.text
     except http_requests.RequestException as e:
         raise ValueError(f"Fehler beim Abrufen der URL: {e}")
diff --git a/backend/routers/settings_router.py b/backend/routers/settings_router.py
index bcd787d..6c4fc27 100644
--- a/backend/routers/settings_router.py
+++ b/backend/routers/settings_router.py
@@ -96,7 +96,7 @@ def update_settings(
     # For these three override colours, an explicit null is meaningful
     # ("reset to default") and must be persisted as NULL. All other fields
     # keep the previous behaviour where a null/missing value is ignored.
-    NULLABLE_OVERRIDES = {"text_color", "line_color", "bg_color", "group_visible_calendar_id", "default_reminder_minutes"}
+    NULLABLE_OVERRIDES = {"text_color", "line_color", "bg_color", "group_visible_calendar_id", "default_reminder_minutes", "default_event_duration_minutes"}
     update_data = data.model_dump(exclude_unset=True)
     for field, value in update_data.items():
         if field in NULLABLE_OVERRIDES: