diff --git a/addons/bus/websocket.py b/addons/bus/websocket.py
index 91b628f4a96..21ddc3de770 100644
--- a/addons/bus/websocket.py
+++ b/addons/bus/websocket.py
@@ -862,7 +862,7 @@ class WebsocketConnectionHandler:
         return Response(status=101, headers={
             'Upgrade': 'websocket',
             'Connection': 'Upgrade',
-            'Sec-WebSocket-Accept': accept_header,
+            'Sec-WebSocket-Accept': accept_header.decode(),
         })
 
     @classmethod
diff --git a/odoo/http.py b/odoo/http.py
index a1a27076257..2d6afc1b927 100644
--- a/odoo/http.py
+++ b/odoo/http.py
@@ -1274,6 +1274,10 @@ class FutureResponse:
     def __init__(self):
         self.headers = werkzeug.datastructures.Headers()
 
+    @property
+    def _charset(self):
+        return self.charset
+
     @functools.wraps(werkzeug.Response.set_cookie)
     def set_cookie(self, key, value='', max_age=None, expires=-1, path='/', domain=None, secure=False, httponly=False, samesite=None, cookie_type='required'):
         if expires == -1:  # not forced value -> default value -> 1 year