diff --git a/taskiq_redis/redis_broker.py b/taskiq_redis/redis_broker.py
index 663c8e4..5c8e7e8 100644
--- a/taskiq_redis/redis_broker.py
+++ b/taskiq_redis/redis_broker.py
@@ -169,6 +169,7 @@ def __init__(
         approximate: bool = True,
         idle_timeout: int = 600000,  # 10 minutes
         unacknowledged_batch_size: int = 100,
+        unacknowledged_lock_timeout: int = 30,
         xread_count: Optional[int] = 100,
         additional_streams: Optional[Dict[str, str]] = None,
         **connection_kwargs: Any,
@@ -196,8 +197,10 @@ def __init__(
         :param xread_count: number of messages to fetch from the stream at once.
         :param additional_streams: additional streams to read from.
             Each key is a stream name, value is a consumer id.
-        :param redeliver_timeout: time in ms to wait before redelivering a message.
         :param unacknowledged_batch_size: number of unacknowledged messages to fetch.
+        :param unacknowledged_lock_timeout: time in seconds before auto-releasing
+            the lock. Useful when the worker crashes or gets killed.
+            Set to a bigger value if your tasks take a long time to complete.
         """
         super().__init__(
             url,
@@ -217,6 +220,7 @@ def __init__(
         self.additional_streams = additional_streams or {}
         self.idle_timeout = idle_timeout
         self.unacknowledged_batch_size = unacknowledged_batch_size
+        self.unacknowledged_lock_timeout = unacknowledged_lock_timeout
         self.count = xread_count
 
     async def _declare_consumer_group(self) -> None:
@@ -298,6 +302,7 @@ async def listen(self) -> AsyncGenerator[AckableMessage, None]:
                 for stream in [self.queue_name, *self.additional_streams.keys()]:
                     lock = redis_conn.lock(
                         f"autoclaim:{self.consumer_group_name}:{stream}",
+                        timeout=self.unacknowledged_lock_timeout,
                     )
                     if await lock.locked():
                         continue