diff --git a/src/balanceof_imbalances.py b/src/balanceof_imbalances.py
index 6c11cbb..66a9418 100644
--- a/src/balanceof_imbalances.py
+++ b/src/balanceof_imbalances.py
@@ -39,9 +39,7 @@ def get_eth_balance(
             print(f"Error fetching ETH balance: {e}")
             return None
 
-    def extract_token_addresses(
-        self, tx_receipt: TxReceipt
-    ) -> Set[ChecksumAddress]:
+    def extract_token_addresses(self, tx_receipt: TxReceipt) -> Set[ChecksumAddress]:
         """Extract unique token addresses from 'Transfer' events in a transaction receipt."""
         token_addresses: Set[ChecksumAddress] = set()
         transfer_topics = {