diff --git a/ChangeLog b/ChangeLog
index 260cc50..84b5bc6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-02-15  Niibe Yutaka  <gniibe@fsij.org>
+
+	* Version 1.0.2.
+	* src/usb_desc.c (gnukStringSerial): Updated.
+
 2013-02-14  Niibe Yutaka  <gniibe@fsij.org>
 
 	* test/features/002_get_data_static.feature: Value of extended
diff --git a/src/main.c b/src/main.c
index 701af2b..4926244 100644
--- a/src/main.c
+++ b/src/main.c
@@ -178,6 +178,7 @@ extern msg_t USBthread (void *arg);
 #define LED_TIMEOUT_STOP	MS2ST(200)
 
 
+/* It has two-byte prefix and content is "FSIJ-1.0.1-" (2 + 11*2).  */
 #define ID_OFFSET 24
 static void
 device_initialize_once (void)
diff --git a/src/usb_desc.c b/src/usb_desc.c
index 81b00b5..86ca7bd 100644
--- a/src/usb_desc.c
+++ b/src/usb_desc.c
@@ -260,9 +260,9 @@ static const uint8_t gnukStringLangID[] = {
 const uint8_t gnukStringSerial[] = {
   19*2+2,			/* bLength */
   USB_STRING_DESCRIPTOR_TYPE,	/* bDescriptorType */
-  /* FSIJ-1.0 */
+  /* FSIJ-1.0.1- */
   'F', 0, 'S', 0, 'I', 0, 'J', 0, '-', 0,
-  '1', 0, '.', 0, '0', 0, '.', 0, '1', 0, /* Version number of Gnuk */
+  '1', 0, '.', 0, '0', 0, '.', 0, '2', 0, /* Version number of Gnuk */
   '-', 0,
   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,