diff --git a/up.go b/up.go
index 236c449..e1b0c81 100644
--- a/up.go
+++ b/up.go
@@ -48,6 +48,7 @@ func CreateInterface(conf *DsnetConfig) {
 
 	wg, err := wgctrl.New()
 	check(err)
+	defer wg.Close()
 
 	err = wg.ConfigureDevice(conf.InterfaceName, wgConfig)