Future Plans of the ATLAS Collaboration for the HL-LHC

These proceedings report the current plans to upgrade the ATLAS detector at CERN for the High Luminosity LHC (HL-LHC). The HL-LHC is expected to start operations in the middle of 2026, aiming to reach an ultimate peak instantaneous luminosity of 7.5$\times10^{34}$cm$^{-2}$s$^{-1}$, corresponding to approximately 200 inelastic proton-proton collisions per bunch crossing, and to deliver over a period of twelve years more than ten times the integrated luminosity of the large hadron collider (LHC) Runs 1-3 combined (up to $4000$ fb$^{-1}$). This is a huge challenge to all sub-systems of the detector which will need extensive upgrades to allow the experiment to pursue a rich and interesting physics programme in the future.