diff --git a/src/authenticators/ldap_ynhuser.py b/src/authenticators/ldap_ynhuser.py
index 331cf9e25..8a2b10aa0 100644
--- a/src/authenticators/ldap_ynhuser.py
+++ b/src/authenticators/ldap_ynhuser.py
@@ -133,7 +133,7 @@ class Authenticator(BaseAuthenticator):
 
         response.set_cookie(
             "yunohost.portal",
-            jwt.encode(new_infos, session_secret, algorithm="HS256").decode(),
+            jwt.encode(new_infos, session_secret, algorithm="HS256"),
             secure=True,
             httponly=True,
             path="/",