diff --git a/dagflow/dagflow.py b/dagflow/dagflow.py
index f92a2c5..30769b8 100644
--- a/dagflow/dagflow.py
+++ b/dagflow/dagflow.py
@@ -317,7 +317,7 @@ where backid=${backid}$
 						'id': ne.id,
 						'status': 'completed'
 					})
-					self.check_instance_completed(sor, inst)
+					await self.check_instance_completed(sor, inst)
 				
 
 	# ------------------------------