  We revisit the previous determination of the strong coupling constant from
moments of quarkonium correlators in (2+1)-flavor QCD. We use previously
calculated moments obtained with Highly Improved Staggered Quark (HISQ) action
for five different quark masses and several lattice spacings. We perform a
careful continuum extrapolation of the moments, and from the comparison of
these to the perturbative result we determine the QCD Lambda parameter,
$\Lambda_{\overline{MS}}^{n_f=3}=332 \pm 17 \pm 2(scale)$ MeV. This corresponds
to $\alpha_s^{n_f=5}(\mu=M_Z)=0.11773(119)$.
