Comment # 2 on bug 1164970 from Ond��ej S��kup

(In reply to Axel Braun from comment #1)
> This was already discussed upstream:
> https://bugs.tryton.org/issue9042
> but the solution is not satisfying

.. update Trytond to 5.4 with support for Werzeug-1.0.0 , or backport
https://hg.tryton.org/trytond/rev/691d0ad1b947