Beat cream cheese and sugar until creamy and no lumps remain. Add pumpkin puree, salt and pumpkin pie spice and mix well.
In a separate bowl, beat the heavy whipping cream on medium to medium high until stiff peaks form.
Fold the whipped cream into the pumpkin mixture until no streaks of cream remain.
Pour the filling over the baked pie crust, smoothing the top.
Cover and refrigerate the pie for 4 hours.