diff --git a/arango/database.py b/arango/database.py
index 0c99427..22f6d73 100644
--- a/arango/database.py
+++ b/arango/database.py
@@ -3241,7 +3241,7 @@ def __init__(
         lock_timeout: Optional[int] = None,
         max_size: Optional[int] = None,
         transaction_id: Optional[str] = None,
-        skip_fast_lock_round: Optional[bool] = False,
+        skip_fast_lock_round: Optional[bool] = None,
     ) -> None:
         self._executor: TransactionApiExecutor
         super().__init__(
diff --git a/arango/executor.py b/arango/executor.py
index 355f010..9330e11 100644
--- a/arango/executor.py
+++ b/arango/executor.py
@@ -261,7 +261,7 @@ def __init__(
         max_size: Optional[int] = None,
         allow_dirty_read: bool = False,
         transaction_id: Optional[str] = None,
-        skip_fast_lock_round: Optional[bool] = False,
+        skip_fast_lock_round: Optional[bool] = None,
     ) -> None:
         self._conn = connection