diff --git a/gns3server/compute/base_node.py b/gns3server/compute/base_node.py
index 639a5d41..13da0a8c 100644
--- a/gns3server/compute/base_node.py
+++ b/gns3server/compute/base_node.py
@@ -662,6 +662,7 @@ class BaseNode:
         path = shutil.which(path)
         return path
 
+    @locking
     async def _ubridge_send(self, command):
         """
         Sends a command to uBridge hypervisor.