diff --git a/grzegorz/mpv.py b/grzegorz/mpv.py
index 442d7d8..318cbd4 100644
--- a/grzegorz/mpv.py
+++ b/grzegorz/mpv.py
@@ -87,7 +87,7 @@ class MPVControl:
             pass
 
     async def send_request(self, msg):
-        with await self.request_lock:
+        async with self.request_lock:
             # Note: If asyncio.Lock is FIFO, the put can be moved out of the
             # critical section. If await is FIFO, the lock is unnessesary. This
             # is the safest option.