diff --git a/.travis.yml b/.travis.yml
index d0f42e4..8db2237 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ python:
   - "3.7"
   - "3.8"
   - "3.9"
+  - "3.10"
 matrix:
   allow_failures:
     python: "nightly"
diff --git a/monero/address.py b/monero/address.py
index 2def4b0..69e193d 100644
--- a/monero/address.py
+++ b/monero/address.py
@@ -1,6 +1,5 @@
 from binascii import hexlify, unhexlify
 import re
-from sha3 import keccak_256
 import six
 import struct
 import warnings
@@ -9,6 +8,7 @@ from . import base58
 from . import const
 from . import ed25519
 from . import numbers
+from .keccak import keccak_256
 
 _ADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{95}$')
 _IADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{106}$')
diff --git a/monero/keccak.py b/monero/keccak.py
new file mode 100644
index 0000000..5b6e88f
--- /dev/null
+++ b/monero/keccak.py
@@ -0,0 +1,10 @@
+from Cryptodome.Hash import keccak
+
+
+def keccak_256(data):
+    """
+    Return a hashlib-compatible Keccak 256 object for the given data.
+    """
+    hash = keccak.new(digest_bits=256)
+    hash.update(data)
+    return hash
diff --git a/monero/seed.py b/monero/seed.py
index 5601c02..a98ca89 100644
--- a/monero/seed.py
+++ b/monero/seed.py
@@ -37,10 +37,10 @@
 
 from binascii import hexlify, unhexlify
 from os import urandom
-from sha3 import keccak_256
 import warnings
 from . import base58, const, ed25519, wordlists
 from .address import address
+from .keccak import keccak_256
 
 class Seed(object):
     """Creates a seed object either from local system randomness or an imported phrase.
@@ -124,9 +124,7 @@ class Seed(object):
         return self.hex
 
     def _hex_seed_keccak(self):
-        h = keccak_256()
-        h.update(unhexlify(self.hex))
-        return h.digest()
+        return keccak_256(unhexlify(self.hex)).digest()
 
     def secret_spend_key(self):
         a = self._hex_seed_keccak() if self.is_mymonero() else unhexlify(self.hex)
@@ -134,9 +132,7 @@ class Seed(object):
 
     def secret_view_key(self):
         b = self._hex_seed_keccak() if self.is_mymonero() else unhexlify(self.secret_spend_key())
-        h = keccak_256()
-        h.update(b)
-        return self.sc_reduce(h.digest())
+        return self.sc_reduce(keccak_256(b).digest())
 
     def public_spend_key(self):
         if self._ed_pub_spend_key:
@@ -164,9 +160,7 @@ class Seed(object):
                 "Invalid net argument '{:s}'. Must be one of monero.const.NET_*".format(net))
         netbyte = (18, 53, 24)[const.NETS.index(net)]
         data = "{:x}{:s}{:s}".format(netbyte, self.public_spend_key(), self.public_view_key())
-        h = keccak_256()
-        h.update(unhexlify(data))
-        checksum = h.hexdigest()
+        checksum = keccak_256(unhexlify(data)).hexdigest()
         return address(base58.encode(data + checksum[0:8]))
 
 
diff --git a/monero/transaction/__init__.py b/monero/transaction/__init__.py
index 8fc9f54..b323754 100644
--- a/monero/transaction/__init__.py
+++ b/monero/transaction/__init__.py
@@ -2,7 +2,6 @@ import binascii
 import itertools
 import operator
 import re
-import sha3
 import six
 import struct
 import varint
@@ -12,6 +11,7 @@ from ..numbers import from_atomic, PaymentID
 from .. import ed25519
 from .. import exceptions
 from .extra import ExtraParser
+from ..keccak import keccak_256
 
 class Payment(object):
     """
@@ -138,7 +138,7 @@ class Transaction(object):
                         varint.encode(idx),
                     ]
                 )
-                Hs_ur = sha3.keccak_256(hsdata).digest()
+                Hs_ur = keccak_256(hsdata).digest()
 
                 # sc_reduce32:
                 Hsint_ur = ed25519.decodeint(Hs_ur)
@@ -159,7 +159,7 @@ class Transaction(object):
                         timestamp=self.timestamp,
                         transaction=self,
                         local_address=addr)
-                amount_hs = sha3.keccak_256(b"amount" + Hs).digest()
+                amount_hs = keccak_256(b"amount" + Hs).digest()
                 xormask = amount_hs[:len(encamount)]
                 dec_amount = bytearray(a ^ b for a, b in zip(*map(bytearray, (encamount, xormask))))
                 int_amount = struct.unpack("<Q", dec_amount)[0]
diff --git a/monero/wallet.py b/monero/wallet.py
index 25d20d5..065dadd 100644
--- a/monero/wallet.py
+++ b/monero/wallet.py
@@ -1,5 +1,4 @@
 from binascii import hexlify, unhexlify
-from sha3 import keccak_256
 import struct
 
 from . import address
@@ -9,6 +8,7 @@ from . import const
 from . import ed25519
 from . import numbers
 from .transaction import Payment, PaymentManager
+from .keccak import keccak_256
 
 class Wallet(object):
     """
diff --git a/requirements.txt b/requirements.txt
index 38bde9a..f51752b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pysha3
+pycryptodomex
 requests
 six>=1.12.0
 ipaddress