diff --git a/build_lib.sh b/build_lib.sh
index b64837a..f755ab4 100755
--- a/build_lib.sh
+++ b/build_lib.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 APP_NAME="libgofunc"
-VERSION="${1:-v0.1.12}"
+VERSION="${1:-v0.1.13}"
 OUTPUT_DIR="../assets"
 BUILD_DIR="../build"
 
diff --git a/printer.go b/printer.go
index bfc710b..e9605f0 100644
--- a/printer.go
+++ b/printer.go
@@ -104,7 +104,7 @@ func connect(printer string) (io.ReadWriteCloser, error) {
 		return conn, nil
 	} else if strings.HasPrefix(printer, "usb:") {
 		location := strings.TrimLeft(printer, "usb:")
-		f, err := os.OpenFile(location, os.O_RDWR, os.ModeDevice)
+		f, err := os.OpenFile(location, os.O_WRONLY, 0666)
 		if err != nil {
 			log.Println("error os.OpenFile usb:", err.Error())
 			return nil, err