diff --git a/fuzzy_extractor/__init__.py b/fuzzy_extractor/__init__.py
index 7a21d36..2490737 100644
--- a/fuzzy_extractor/__init__.py
+++ b/fuzzy_extractor/__init__.py
@@ -32,7 +32,7 @@
 from math import log
 from os import urandom
 from struct import pack, unpack
-from fastpbkdf2 import pbkdf2_hmac
+from hashlib import pbkdf2_hmac
 import numpy as np
 
 class FuzzyExtractor(object):
diff --git a/requirements.txt b/requirements.txt
index 4ec046e..6d831c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1 @@
-fastpbkdf2>=0.2
 numpy>=1.12.1
diff --git a/setup.py b/setup.py
index 1cd5e91..b871929 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@ def extract_metaitem(meta):
     download_url=extract_metaitem('download_url'),
     packages=find_packages(exclude=('tests', 'docs')),
     platforms=['Any'],
-    install_requires=['fastpbkdf2', 'numpy'],
+    install_requires=['numpy'],
     tests_require=['pytest'],
     keywords='fuzzy extractor security',
     classifiers=[
@@ -71,5 +71,7 @@ def extract_metaitem(meta):
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
     ],
 )