diff --git a/interfaces.go b/interfaces.go
index 089b6dd..de1f7c8 100644
--- a/interfaces.go
+++ b/interfaces.go
@@ -32,6 +32,9 @@
 	CreateServer(ns NewServer) (*NewServer, error)
 	DeleteServerById(id string) error
 	SetAdminPassword(id string, pw string) error
+	ResizeServer(id, newName, newFlavor, newDiskConfig string) error
+	RevertResize(id string) error
+	ConfirmResize(id string) error
 
   // Images