No module named bluepy

Hi all, i’m attempting to run bt-mqtt-gateway to detect some NUT beacons but when i execute the command “sudo ./gateway.py” e get this error

22:11:38 Starting
Traceback (most recent call last):
  File "./gateway.py", line 67, in <module>
    manager.register_workers(global_topic_prefix).start(mqtt)
  File "/home/pi/bt-mqtt-gateway/workers_manager.py", line 81, in register_workers
    module_obj = importlib.import_module("workers.%s" % worker_name)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/pi/bt-mqtt-gateway/workers/blescanmulti.py", line 3, in <module>
    from bluepy.btle import Scanner, DefaultDelegate
ModuleNotFoundError: No module named 'bluepy'

what i can do? Thanks