  We employ optimal renormalization group analysis to semi-leptonic
$\tau$-decay polarization functions and extract the strange quark mass from
their moments measured by the ALEPH and OPAL collaborations. The optimal
renormalization group makes use of the renormalization group equation of a
given perturbation series which then leads to closed form sum of all the
renormalization group-accessible logarithms which have reduced scale
dependence. Using the latest theoretical inputs we find $m_s(2{\rm GeV}) =
106.70 \pm 9.36~{\rm MeV}$ and $m_s(2{\rm GeV}) = 74.47 \pm 7.77~{\rm MeV}$ for
ALEPH and OPAL data respectively.
