1. `apt-get update`
2. `apt-get install xserver-xorg-input-synaptics`
3. Replace the contents of the file `/usr/share/X11/xorg.conf.d/70-synaptics.conf` with the following:

   ```
   Section "InputClass"
       Identifier "touchpad catchall"
       Driver "synaptics"
       MatchIsTouchpad "on"
       MatchDevicePath "/dev/input/event*"
       Option "FingerLow" "10"
       Option "FingerHigh" "16"
       Option "TapButton1" "1"
       Option "TapButton2" "3"
       Option "VertTwoFingerScroll" "on"
   EndSection
   ```

4. Reboot