Current status and the upgrade of COSINE-100 experiment

COSINE-100 is a direct-detection dark matter search experiment with the goal of testing DAMA/LIBRA's claim of an annual modulation, using the same NaI(Tl) target. The experiment has been collecting physics data since September 2016 at the Yangyang underground laboratory, South Korea. It consists of ~106 kg of low background NaI(Tl) detectors submerged in a 2 tons liquid scintillator veto counter.  In this talk, we present the status of COSINE-100, including the recent results on WIMP-nucleus scattering within the context of several dark matter models, and prospects for the next phase, COSINE-200.