diff --git a/core/interface.go b/core/interface.go
index beff886..e6e2ca5 100644
--- a/core/interface.go
+++ b/core/interface.go
@@ -171,6 +171,7 @@ type Node interface {
 	WSEndpoint() string
 	ResolvePath(x string) string
 	Attach() (Client, error)
+	Close() error
 }
 
 type Client interface {