diff --git a/library/calendar_sync.py b/library/calendar_sync.py
index efa6d8a..331ee4a 100644
--- a/library/calendar_sync.py
+++ b/library/calendar_sync.py
@@ -36,7 +36,7 @@ def fetch_ics_events(url, user=None, password=None):
     except Exception as e:
         raise Exception(f"ICS-Fehler: {str(e)}")
 
-def connect_caldav(url, user=None, password=None, verify_ssl=True):
+def connect_caldav(url, user=None, password=None, verify_ssl=False):
     try:
         client = DAVClient(
             url,