diff --git a/tests/test_wallet.py b/tests/test_wallet.py
index 2e64be08..e0eeed9e 100644
--- a/tests/test_wallet.py
+++ b/tests/test_wallet.py
@@ -386,14 +386,14 @@ async def asyncSetUp(self) -> None:
 
     async def test_approve_deposit(self):
         token = Token(
-            address=Web3.toChecksumAddress('0xeb8f08a975ab53e34d8a0330e0d34de942c95926'),
+            address=Web3.to_checksum_address('0xeb8f08a975ab53e34d8a0330e0d34de942c95926'),
             id=20, symbol='USDC',
             decimals=18)
         assert await self.ethereum_provider.approve_deposit(token, Decimal(1))
 
     async def test_full_exit(self):
         token = Token(
-            address=Web3.toChecksumAddress('0xD2084eA2AE4bBE1424E4fe3CDE25B713632fb988'),
+            address=Web3.to_checksum_address('0xD2084eA2AE4bBE1424E4fe3CDE25B713632fb988'),
             id=20, symbol='BAT',
             decimals=18)
         assert await self.ethereum_provider.full_exit(token, 6713)
@@ -410,7 +410,7 @@ async def test_full_exit_nft(self):
         """
         account_id = 36357
         token = Token(
-            address=Web3.toChecksumAddress('0x5e71f0f9b891f22d79ff8697dd4e3e0db371cda5'),
+            address=Web3.to_checksum_address('0x5e71f0f9b891f22d79ff8697dd4e3e0db371cda5'),
             id=70848,
             symbol='NFT-70848',
             decimals=0
@@ -419,7 +419,7 @@ async def test_full_exit_nft(self):
 
     async def test_is_deposit_approved(self):
         token = Token(
-            address=Web3.toChecksumAddress('0xD2084eA2AE4bBE1424E4fe3CDE25B713632fb988'),
+            address=Web3.to_checksum_address('0xD2084eA2AE4bBE1424E4fe3CDE25B713632fb988'),
             id=20, symbol='BAT',
             decimals=18)
         assert await self.ethereum_provider.is_deposit_approved(token, 1)
diff --git a/zksync_sdk/types/responses.py b/zksync_sdk/types/responses.py
index 7782d6da..ba5ad5c7 100644
--- a/zksync_sdk/types/responses.py
+++ b/zksync_sdk/types/responses.py
@@ -28,7 +28,7 @@ class NFT(Token):
     content_hash: str
     creator_address: str
     serial_id: int
-    decimals = 0
+    decimals: int = 0
 
     def decimal_amount(self, amount: int) -> Decimal:
         return Decimal(amount)
diff --git a/zksync_sdk/zksync.py b/zksync_sdk/zksync.py
index 4a17df44..b85e6e16 100644
--- a/zksync_sdk/zksync.py
+++ b/zksync_sdk/zksync.py
@@ -27,7 +27,7 @@ def _call_method(self, method_name, *args, amount=None, **kwargs):
         transaction.update({'nonce': self.web3.eth.get_transaction_count(self.account.address)})
         signed_tx = self.account.sign_transaction(transaction)
         txn_hash = self.web3.eth.send_raw_transaction(signed_tx.rawTransaction)
-        txn_receipt = self.web3.eth.waitForTransactionReceipt(txn_hash)
+        txn_receipt = self.web3.eth.wait_for_transaction_receipt(txn_hash)
         return txn_receipt
 
 
diff --git a/zksync_sdk/zksync_provider/v01.py b/zksync_sdk/zksync_provider/v01.py
index a539bcbb..7ffbc96b 100644
--- a/zksync_sdk/zksync_provider/v01.py
+++ b/zksync_sdk/zksync_provider/v01.py
@@ -28,7 +28,7 @@ async def submit_tx(self, tx: EncodedTx, signature: Union[Optional[TxEthSignatur
 
     async def get_tokens(self) -> Tokens:
         data = await self.provider.request("tokens", None)
-        tokens = [Token(address=Web3.toChecksumAddress(token['address']),
+        tokens = [Token(address=Web3.to_checksum_address(token['address']),
                         id=token['id'],
                         symbol=token['symbol'],
                         decimals=token['decimals']