diff --git a/bin/validity-led-dance b/bin/validity-led-dance
index 48e12cc..2e67a2b 100755
--- a/bin/validity-led-dance
+++ b/bin/validity-led-dance
@@ -5,7 +5,9 @@ import os
 from binascii import unhexlify
 from enum import Enum
 from validitysensor.flash import read_flash
-from validitysensor.sensor import *
+from validitysensor.sensor import glow_start_scan, glow_end_scan
+from validitysensor.util import assert_status
+from validitysensor.tls import tls
 from validitysensor import init
 from time import sleep
 from usb import core as usb_core
diff --git a/validitysensor/tls.py b/validitysensor/tls.py
index dc9cdcf..7be4ff5 100644
--- a/validitysensor/tls.py
+++ b/validitysensor/tls.py
@@ -3,7 +3,7 @@ import os
 import pickle
 import logging
 from struct import pack, unpack
-from binascii import *
+from binascii import hexlify, unhexlify
 
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.hazmat.backends import default_backend
diff --git a/validitysensor/usb.py b/validitysensor/usb.py
index fd7c2f2..6b80bc9 100644
--- a/validitysensor/usb.py
+++ b/validitysensor/usb.py
@@ -1,7 +1,7 @@
 import logging
 import errno
 import usb.core as ucore
-from binascii import *
+from binascii import hexlify, unhexlify
 from .util import assert_status
 from struct import unpack
 from usb.core import USBError