Here is a true "Oldschool" fix that a true oldschool drummer showed me ...
These go under
the head just like the old style movable dampers. You can get a pack (any hardware store)
of multiple sizes,
first lay one or more
on top of the head and just touch it with your finger lightly to see if that size is the one you need.
After you determine the size and or how many you may need to use, take the head off and apply the pad to the bottom
using the sticky on the pad ... re-install the head and tune it up.