diff --git a/backend/src/appointment/controller/calendar.py b/backend/src/appointment/controller/calendar.py
index d82c9a2fd..1d02a3d3c 100644
--- a/backend/src/appointment/controller/calendar.py
+++ b/backend/src/appointment/controller/calendar.py
@@ -249,10 +249,11 @@ def __init__(self, subscriber_id: int, calendar_id: int, redis_instance, url: st
         super().__init__(subscriber_id, calendar_id, redis_instance)
 
         self.provider = CalendarProvider.caldav
-        self.url = url
+        self.url = url if url[-1] == '/' else url + '/'
         self.password = password
         self.user = user
-        # connect to CalDAV server
+
+        # connect to the CalDAV server
         self.client = DAVClient(url=url, username=user, password=password)
 
     def test_connection(self) -> bool:
diff --git a/backend/src/appointment/routes/api.py b/backend/src/appointment/routes/api.py
index 21ee1cabc..6a12c350d 100644
--- a/backend/src/appointment/routes/api.py
+++ b/backend/src/appointment/routes/api.py
@@ -135,10 +135,6 @@ def create_my_calendar(
             google_tkn=external_connection.token,
         )
     else:
-        # make sure, the CalDAV url has a trailing slash
-        if calendar.url[-1] != '/':
-            calendar.url += '/'
-
         con = CalDavConnector(
             redis_instance=None,
             url=calendar.url,
@@ -194,10 +190,6 @@ def update_my_calendar(
     if not repo.calendar.is_owned(db, calendar_id=id, subscriber_id=subscriber.id):
         raise validation.CalendarNotAuthorizedException()
 
-    # make sure, the CalDAV url has a trailing slash
-    if calendar.provider == CalendarProvider.caldav and calendar.url[-1] != '/':
-        calendar.url += '/'
-
     cal = repo.calendar.update(db=db, calendar=calendar, calendar_id=id)
     return schemas.CalendarOut(id=cal.id, title=cal.title, color=cal.color, connected=cal.connected)
 
diff --git a/backend/test/integration/test_calendar.py b/backend/test/integration/test_calendar.py
index 5b84eac4c..d9d4a8566 100644
--- a/backend/test/integration/test_calendar.py
+++ b/backend/test/integration/test_calendar.py
@@ -361,7 +361,7 @@ def test_update_existing_caldav_calendar_with_password(self, with_client, with_d
         with with_db() as db:
             cal = db.scalars(query).one()
 
-        assert cal.url == os.getenv("CALDAV_TEST_CALENDAR_URL") + "x/"
+        assert cal.url == os.getenv("CALDAV_TEST_CALENDAR_URL") + "x"
         assert cal.user == os.getenv("CALDAV_TEST_USER") + "x"
         assert cal.password == os.getenv("CALDAV_TEST_PASS") + "x"
 
@@ -394,6 +394,6 @@ def test_update_existing_caldav_calendar_without_password(self, with_client, wit
         with with_db() as db:
             cal = db.scalars(query).one()
 
-        assert cal.url == os.getenv("CALDAV_TEST_CALENDAR_URL") + "/"
+        assert cal.url == os.getenv("CALDAV_TEST_CALENDAR_URL")
         assert cal.user == os.getenv("CALDAV_TEST_USER")
         assert cal.password == ''