diff --git a/classCAN.py b/classCAN.py
index 8c4d6be..33dca4e 100644
--- a/classCAN.py
+++ b/classCAN.py
@@ -9,7 +9,7 @@ class CANBackend:
         self.network = None
         self.nodes = {}  # {1: RemoteNode(0x02), 2: RemoteNode(0x03), ...}
         self.connected = False
-        self.lock = threading.Lock()
+        self.lock = asyncio.Lock()
         self.polling_thread = None
         self.polling_active = False
         self.latest_data = {