diff --git a/cats/cats.py b/cats/cats.py
index 5c78402..ab7d335 100644
--- a/cats/cats.py
+++ b/cats/cats.py
@@ -13,12 +13,10 @@
 from chia.rpc.wallet_request_types import PushTX
 from chia.rpc.wallet_rpc_client import WalletRpcClient
 from chia.types.blockchain_format.program import Program
-from chia.types.blockchain_format.sized_bytes import bytes32
 from chia.util.bech32m import decode_puzzle_hash
 from chia.util.byte_types import hexstr_to_bytes
 from chia.util.config import load_config
 from chia.util.default_root import DEFAULT_ROOT_PATH
-from chia.util.ints import uint64
 from chia.wallet.cat_wallet.cat_utils import (
     CAT_MOD,
     SpendableCAT,
@@ -30,6 +28,8 @@
 from chia.wallet.vc_wallet.cr_cat_drivers import ProofsChecker, construct_cr_layer
 from chia.wallet.wallet_spend_bundle import WalletSpendBundle
 from chia_rs import AugSchemeMPL, G2Element
+from chia_rs.sized_bytes import bytes32
+from chia_rs.sized_ints import uint64
 from clvm_tools.binutils import assemble
 from clvm_tools.clvmc import compile_clvm_text
 
diff --git a/cats/secure_the_bag.py b/cats/secure_the_bag.py
index 8f0b7f0..b4dab74 100644
--- a/cats/secure_the_bag.py
+++ b/cats/secure_the_bag.py
@@ -8,13 +8,13 @@
 import click
 from chia.types.blockchain_format.coin import Coin
 from chia.types.blockchain_format.program import Program
-from chia.types.blockchain_format.sized_bytes import bytes32
 from chia.types.coin_spend import CoinSpend, make_spend
 from chia.types.condition_opcodes import ConditionOpcode
 from chia.util.bech32m import encode_puzzle_hash
 from chia.util.byte_types import hexstr_to_bytes
-from chia.util.ints import uint64
 from chia.wallet.cat_wallet.cat_utils import CAT_MOD, construct_cat_puzzle
+from chia_rs.sized_bytes import bytes32
+from chia_rs.sized_ints import uint64
 from clvm_tools.binutils import assemble
 from clvm_tools.clvmc import compile_clvm_text
 
diff --git a/setup.py b/setup.py
index c09d53e..d80b230 100644
--- a/setup.py
+++ b/setup.py
@@ -8,12 +8,13 @@
     long_description = fh.read()
 
 dependencies = [
-    "chia-blockchain==2.5.1",
+    "chia-rs==0.21.2",
+    "chia-blockchain==2.5.3",
 ]
 
 dev_dependencies = [
     "pytest",
-    "pytest-asyncio",
+    "pytest-asyncio>=0.26.0",
     "pytest-env",
     "pre-commit==4.1.0; python_version >= '3.9'",
     "mypy==1.15.0",
diff --git a/tests/cats/test_cat_command.py b/tests/cats/test_cat_command.py
index 048fe73..50da704 100644
--- a/tests/cats/test_cat_command.py
+++ b/tests/cats/test_cat_command.py
@@ -6,10 +6,10 @@
 import pytest
 from chia._tests.util.setup_nodes import SimulatorsAndWalletsServices
 from chia.types.blockchain_format.coin import Coin
-from chia.types.blockchain_format.sized_bytes import bytes32
 from chia.types.peer_info import PeerInfo
 from chia.util.bech32m import encode_puzzle_hash
-from chia.util.ints import uint16, uint64
+from chia_rs.sized_bytes import bytes32
+from chia_rs.sized_ints import uint16, uint64
 
 from cats.cats import cmd_func
 
diff --git a/tests/cats/test_secure_the_bag.py b/tests/cats/test_secure_the_bag.py
index ce99de2..d65c01c 100644
--- a/tests/cats/test_secure_the_bag.py
+++ b/tests/cats/test_secure_the_bag.py
@@ -2,11 +2,11 @@
 
 import pytest
 from chia.types.blockchain_format.program import Program
-from chia.types.blockchain_format.sized_bytes import bytes32
 from chia.types.condition_opcodes import ConditionOpcode
 from chia.util.hash import std_hash
-from chia.util.ints import uint64
 from chia.wallet.cat_wallet.cat_utils import CAT_MOD, construct_cat_puzzle
+from chia_rs.sized_bytes import bytes32
+from chia_rs.sized_ints import uint64
 from clvm.casts import int_to_bytes
 
 from cats.secure_the_bag import (