diff --git a/lib/usb_cdcacm.c b/lib/usb_cdcacm.c
index 6516e5a..387e743 100644
--- a/lib/usb_cdcacm.c
+++ b/lib/usb_cdcacm.c
@@ -2,7 +2,7 @@
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
  *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
- *  @date 2016-2019
+ *  @date 2016-2020
  */
 
 /* standard libraries */
@@ -222,14 +222,14 @@ static const struct usb_config_descriptor usb_cdcacm_configuration_descriptor =
 };
 
 /** device ID used as serial number */
-static char usb_serial[] = "00112233445566778899aabb";
+static char usb_serial[] = "0123456789ab";
 
 /** USB string table
  *  @note starting with index 1
  */
 static const char* usb_strings[] = {
 	"CuVoodoo", /**< manufacturer string */
-	"CuVoodoo STM32F1xx firmware", /**< product string */
+	"CuVoodoo STM32F4xx firmware", /**< product string */
 	(const char*)usb_serial, /**< device ID used as serial number */
 	"DFU bootloader (runtime mode)", /**< DFU interface string */
 };