diff --git a/misc/scancode-fingerprint/setup.py b/misc/scancode-fingerprint/setup.py
index abcb5b0..8c92665 100644
--- a/misc/scancode-fingerprint/setup.py
+++ b/misc/scancode-fingerprint/setup.py
@@ -43,12 +43,11 @@
     ],
     install_requires=[
         'scancode-toolkit',
+        'bitarray==2.7.3'
     ],
     entry_points={
      'scancode_scan': [
          'fingerprint = plugin_fingerprint.plugin_fingerprint:FingerprintScanner',
         ],
     }
-
-
-)
+)
\ No newline at end of file
diff --git a/misc/scancode-fingerprint/src/plugin_fingerprint/fingerprint.py b/misc/scancode-fingerprint/src/plugin_fingerprint/fingerprint.py
index 5344f75..fda9c80 100644
--- a/misc/scancode-fingerprint/src/plugin_fingerprint/fingerprint.py
+++ b/misc/scancode-fingerprint/src/plugin_fingerprint/fingerprint.py
@@ -24,7 +24,7 @@
 
 import binascii
 from bitarray import bitarray
-from bitarray import bitdiff
+from bitarray.util import count_xor
 import hashlib
 
 from commoncode.text import toascii
@@ -141,7 +141,7 @@ def hamming_distance(self, fingerprint1, fingerprint2):
         Hamming distance is the difference in the bits of two binary string.
         Files with fingerprints whose hamming distance are less tends to be more similar.
         """
-        distance = bitdiff(fingerprint1, fingerprint2)
+        distance = count_xor(fingerprint1, fingerprint2)
         result = int(distance)
 
         return result