diff --git a/cashews/backends/transaction.py b/cashews/backends/transaction.py
index 45501470..64d1f4e9 100644
--- a/cashews/backends/transaction.py
+++ b/cashews/backends/transaction.py
@@ -280,6 +280,7 @@ async def _lock_updates(self, key: Key):
         step = 0.1
         while wait > 0.0:
             wait -= step
+            wait = round(wait, 1)
             if await self._backend.set_lock(lock_key, self._lock_id, expire=self._timeout):
                 self._locks.add(lock_key)
                 return