diff --git a/bumble/smp.py b/bumble/smp.py
index 6a8af40..152f916 100644
--- a/bumble/smp.py
+++ b/bumble/smp.py
@@ -764,7 +764,9 @@ class Session:
         self.peer_io_capability = SMP_NO_INPUT_NO_OUTPUT_IO_CAPABILITY
 
         # OOB
-        self.oob_data_flag = 1 if pairing_config.oob and pairing_config.oob.peer_data else 0
+        self.oob_data_flag = (
+            1 if pairing_config.oob and pairing_config.oob.peer_data else 0
+        )
 
         # Set up addresses
         self_address = connection.self_resolvable_address or connection.self_address