diff --git a/web/b3desk/endpoints/join.py b/web/b3desk/endpoints/join.py
index 262b726d..ee5fe876 100644
--- a/web/b3desk/endpoints/join.py
+++ b/web/b3desk/endpoints/join.py
@@ -17,6 +17,7 @@
 from b3desk.models.meetings import get_mail_meeting
 from b3desk.models.meetings import get_meeting_from_meeting_id_and_user_id
 from b3desk.models.roles import Role
+from b3desk.models.users import User
 
 from .. import auth
 from ..session import get_authenticated_attendee_fullname
@@ -66,7 +67,7 @@ def signin_mail_meeting(meeting_fake_id, expiration, h):
 
 
 @bp.route("/meeting/signin/<meeting_fake_id>/creator/<user:creator>/hash/<h>")
-def signin_meeting(meeting_fake_id, creator, h):
+def signin_meeting(meeting_fake_id, creator: User, h):
     meeting = get_meeting_from_meeting_id_and_user_id(meeting_fake_id, creator.id)
     wordings = current_app.config["WORDINGS"]
     if meeting is None:
@@ -101,7 +102,7 @@ def signin_meeting(meeting_fake_id, creator, h):
 
 @bp.route("/meeting/auth/<meeting_fake_id>/creator/<user:creator>/hash/<h>")
 @auth.oidc_auth("default")
-def authenticate_then_signin_meeting(meeting_fake_id, creator, h):
+def authenticate_then_signin_meeting(meeting_fake_id, creator: User, h):
     return redirect(
         url_for(
             "join.signin_meeting",
@@ -124,7 +125,7 @@ def authenticate_then_signin_meeting(meeting_fake_id, creator, h):
 @bp.route(
     "/meeting/wait/<meeting_fake_id>/creator/<user:creator>/hash/<h>/fullname/<path:fullname>/fullname_suffix/<path:fullname_suffix>",
 )
-def waiting_meeting(meeting_fake_id, creator, h, fullname="", fullname_suffix=""):
+def waiting_meeting(meeting_fake_id, creator: User, h, fullname="", fullname_suffix=""):
     meeting = get_meeting_from_meeting_id_and_user_id(meeting_fake_id, creator.id)
     if meeting is None:
         return redirect(url_for("public.index"))
@@ -235,5 +236,5 @@ def join_meeting_as_authenticated(meeting_id):
 @bp.route("/meeting/join/<meeting:meeting>/<role:role>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def join_meeting_as_role(meeting, role: Role, owner):
+def join_meeting_as_role(meeting: Meeting, role: Role, owner: User):
     return redirect(meeting.get_join_url(role, owner.fullname, create=True))
diff --git a/web/b3desk/endpoints/meeting_files.py b/web/b3desk/endpoints/meeting_files.py
index 7e3879f4..4ac10e90 100644
--- a/web/b3desk/endpoints/meeting_files.py
+++ b/web/b3desk/endpoints/meeting_files.py
@@ -30,6 +30,7 @@
 from b3desk.models.meetings import Meeting
 from b3desk.models.meetings import MeetingFiles
 from b3desk.models.meetings import MeetingFilesExternal
+from b3desk.models.users import User
 
 from .. import auth
 from ..session import get_current_user
@@ -41,7 +42,7 @@
 @bp.route("/meeting/files/<meeting:meeting>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def edit_meeting_files(meeting, owner):
+def edit_meeting_files(meeting: Meeting, owner: User):
     form = MeetingFilesForm()
 
     if not current_app.config["FILE_SHARING"]:
@@ -75,7 +76,7 @@ def edit_meeting_files(meeting, owner):
 @bp.route("/meeting/files/<meeting:meeting>", methods=["POST"])
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def add_meeting_files(meeting, owner):
+def add_meeting_files(meeting: Meeting, owner: User):
     data = request.get_json()
     is_default = False
     if len(meeting.files) == 0:
@@ -101,7 +102,7 @@ def add_meeting_files(meeting, owner):
 @bp.route("/meeting/files/<meeting:meeting>/<int:file_id>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def download_meeting_files(meeting, owner, file_id=None):
+def download_meeting_files(meeting: Meeting, owner: User, file_id=None):
     TMP_DOWNLOAD_DIR = current_app.config["TMP_DOWNLOAD_DIR"]
     Path(TMP_DOWNLOAD_DIR).mkdir(parents=True, exist_ok=True)
     tmp_name = f'{current_app.config["TMP_DOWNLOAD_DIR"]}{secrets.token_urlsafe(32)}'
@@ -153,7 +154,7 @@ def download_meeting_files(meeting, owner, file_id=None):
 # called by NextcloudfilePicker when documents should be added to a running room:
 @bp.route("/meeting/files/<meeting:meeting>/insertDocuments", methods=["POST"])
 @auth.oidc_auth("default")
-def insertDocuments(meeting):
+def insertDocuments(meeting: Meeting):
     from flask import request
 
     files_title = request.get_json()
@@ -206,7 +207,7 @@ def insertDocuments(meeting):
 @bp.route("/meeting/files/<meeting:meeting>/toggledownload", methods=["POST"])
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def toggledownload(meeting, owner):
+def toggledownload(meeting: Meeting, owner: User):
     data = request.get_json()
     meeting_file = db.session.get(MeetingFiles, data["id"])
     if not meeting_file:
@@ -221,7 +222,7 @@ def toggledownload(meeting, owner):
 @bp.route("/meeting/files/<meeting:meeting>/default", methods=["POST"])
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def set_meeting_default_file(meeting, owner):
+def set_meeting_default_file(meeting: Meeting, owner: User):
     data = request.get_json()
 
     actual_default_file = meeting.default_file
@@ -429,7 +430,7 @@ def add_external_meeting_file_nextcloud(path, meeting_id):
 @bp.route("/meeting/files/<meeting:meeting>/dropzone", methods=["POST"])
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def add_dropzone_files(meeting, owner):
+def add_dropzone_files(meeting: Meeting, owner: User):
     file = request.files["dropzoneFiles"]
     # for dropzone chunk file by file validation
     # shamelessly taken from https://stackoverflow.com/questions/44727052/handling-large-file-uploads-with-flask
diff --git a/web/b3desk/endpoints/meetings.py b/web/b3desk/endpoints/meetings.py
index 33c81353..a36e367a 100644
--- a/web/b3desk/endpoints/meetings.py
+++ b/web/b3desk/endpoints/meetings.py
@@ -39,7 +39,7 @@
 bp = Blueprint("meetings", __name__)
 
 
-def meeting_mailto_params(meeting, role: Role):
+def meeting_mailto_params(meeting: Meeting, role: Role):
     if role == Role.moderator:
         return render_template(
             "meeting/mailto/mail_href.txt", meeting=meeting, role=role
@@ -90,7 +90,7 @@ def quick_meeting():
 @bp.route("/meeting/show/<meeting:meeting>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def show_meeting(meeting, owner):
+def show_meeting(meeting: Meeting, owner: User):
     # TODO: appears unused
 
     form = ShowMeetingForm(data={"meeting_id": meeting.id})
@@ -111,7 +111,7 @@ def show_meeting(meeting, owner):
 @bp.route("/meeting/recordings/<meeting:meeting>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def show_meeting_recording(meeting, owner):
+def show_meeting_recording(meeting: Meeting, owner: User):
     form = RecordingForm()
     return render_template(
         "meeting/recordings.html",
@@ -124,7 +124,7 @@ def show_meeting_recording(meeting, owner):
 @bp.route("/meeting/<meeting:meeting>/recordings/<recording_id>", methods=["POST"])
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def update_recording_name(meeting, recording_id, owner):
+def update_recording_name(meeting: Meeting, recording_id, owner: User):
     form = RecordingForm(request.form)
     if not form.validate():
         abort(403)
@@ -164,7 +164,7 @@ def new_meeting():
 @bp.route("/meeting/edit/<meeting:meeting>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def edit_meeting(meeting, owner):
+def edit_meeting(meeting: Meeting, owner: User):
     form = (
         MeetingWithRecordForm(obj=meeting)
         if current_app.config["RECORDING"]
@@ -250,7 +250,7 @@ def end_meeting():
 @bp.route("/meeting/create/<meeting:meeting>")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def create_meeting(meeting, owner):
+def create_meeting(meeting: Meeting, owner: User):
     meeting.create_bbb()
     meeting.save()
     return redirect(url_for("public.welcome"))
@@ -259,7 +259,7 @@ def create_meeting(meeting, owner):
 @bp.route("/meeting/<meeting:meeting>/externalUpload")
 @auth.oidc_auth("default")
 @meeting_owner_needed
-def externalUpload(meeting, owner):
+def externalUpload(meeting: Meeting, owner: User):
     if meeting.is_running():
         return render_template("meeting/externalUpload.html", meeting=meeting)
     return redirect(url_for("public.welcome"))