ModuleNotFound

I enter command `python3 -m dragonfire -h` or just `dragonfire`, but it's output this module error and I can't fix it.

Traceback (most recent call last):
File "/usr/lib/python3.8/runpy.py", line 185, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "/usr/lib/python3.8/runpy.py", line 144, in _get_module_details
return _get_module_details(pkg_main_name, error)
File "/usr/lib/python3.8/runpy.py", line 111, in _get_module_details
__import__(pkg_name)
File "/usr/lib/python3/dist-packages/dragonfire/__init__.py", line 33, in
from dragonfire.learn import Learner # Submodule of Dragonfire that forms her learning ability
File "/usr/lib/python3/dist-packages/dragonfire/learn.py", line 13, in
from tinydb import TinyDB, Query # TinyDB is a lightweight document oriented database
ModuleNotFoundError: No module named 'tinydb'