  The IceCube Neutrino Observatory measured a flux of high-energy astrophysical
neutrinos in several detection channels. The energy spectrum is fitted as
unbroken power-law, but different best-fit parameters were obtained in the
various analyses covering different energy ranges between few TeV to 10 PeV.
Here, we present an update to the analysis of through-going muon-neutrinos from
the Northern Hemisphere. It was extended to almost ten years of data and an
improved treatment of systematic uncertainties on the atmospheric fluxes was
implemented. The updated best-fit parameters for the astrophysical flux
assuming a power-law energy spectrum are $\Phi_{astro}=1.44$ and
$\gamma_{astro}=2.28$. We will present the results of the spectral fit and
discuss how the measured flux compares to other IceCube results.
