update to newer Synapse APIs

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/handlers/e2e_room_keys.py b/synapse/handlers/e2e_room_keys.py

index a43fc7fc7e..c09816b372 100644
--- a/synapse/handlers/e2e_room_keys.py
+++ b/synapse/handlers/e2e_room_keys.py
@@ -18,7 +18,7 @@ import logging
 from twisted.internet import defer
 
 from synapse.api.errors import StoreError, SynapseError, RoomKeysVersionError
-from synapse.util.async import Linearizer
+from synapse.util.async_helpers import Linearizer
 
 logger = logging.getLogger(__name__)