By hard do you mean heavy trigger pull or rough/gritty trigger pull? A trigger can be heavy and yet smooth.
If it's the former, you can either replace the springs with aftermarkets like Wolff or try snipping off a coil or two. The tradeoff may be unreliable ignition and you'll have to test fire the gun with the ammo you plan to use.
Rough trigger pulls suggest poor fitting of internal parts, burrs, hand/pawl to ratchet/star ejector, sear or hammer to trigger, cyliner stop, etc. These parts can be tuned by a gunsmith.