diff --git a/fido2/ctaphid.c b/fido2/ctaphid.c
index 7946db6..99573df 100644
--- a/fido2/ctaphid.c
+++ b/fido2/ctaphid.c
@@ -711,7 +711,12 @@ uint8_t ctaphid_handle_packet(uint8_t * pkt_raw)
             ctaphid_write(&wb, NULL, 0);
             is_busy = 0;
         break;
+        case CTAPHID_ENTERSTBOOT:
+            printf1(TAG_HID,"CTAPHID_ENTERBOOT\n");
+            boot_st_bootloader();
+        break;
 #endif
+
         default:
             printf2(TAG_ERR,"error, unimplemented HID cmd: %02x\r\n", buffer_cmd());
             ctaphid_send_error(cid, CTAP1_ERR_INVALID_COMMAND);
diff --git a/fido2/ctaphid.h b/fido2/ctaphid.h
index 5683dbf..0815ef6 100644
--- a/fido2/ctaphid.h
+++ b/fido2/ctaphid.h
@@ -39,8 +39,9 @@
 #define CTAPHID_KEEPALIVE    (TYPE_INIT | 0x3b)
 
 // Custom commands between 0x40-0x7f
-#define CTAPHID_BOOT         (TYPE_INIT | 0x50)
-#define CTAPHID_ENTERBOOT    (TYPE_INIT | 0x51)
+#define CTAPHID_BOOT            (TYPE_INIT | 0x50)
+#define CTAPHID_ENTERBOOT       (TYPE_INIT | 0x51)
+#define CTAPHID_ENTERSTBOOT     (TYPE_INIT | 0x52)
 
     #define ERR_INVALID_CMD         0x01
     #define ERR_INVALID_PAR         0x02
diff --git a/fido2/device.h b/fido2/device.h
index 83b7f63..c6b63f5 100644
--- a/fido2/device.h
+++ b/fido2/device.h
@@ -96,7 +96,7 @@ void ctap_overwrite_rk(int index,CTAP_residentKey * rk);
 
 // For Solo hacker
 void boot_solo_bootloader();
-
+void boot_st_bootloader();
 
 
 
diff --git a/targets/stm32l442/bootloader/bootloader.c b/targets/stm32l442/bootloader/bootloader.c
index f157ec6..41ef628 100644
--- a/targets/stm32l442/bootloader/bootloader.c
+++ b/targets/stm32l442/bootloader/bootloader.c
@@ -22,6 +22,8 @@ typedef enum
     BootCheck = 0x42,
     BootErase = 0x43,
     BootVersion = 0x44,
+    BootReboot = 0x45,
+    BootBootloader = 0x46,
 } BootOperation;
 
 
@@ -143,6 +145,17 @@ int bootloader_bridge(int klen, uint8_t * keyh)
             u2f_response_writeback(&version,1);
             return 0;
             break;
+        case BootReboot:
+            printf1(TAG_BOOT, "BootReboot.\r\n");
+            device_reboot();
+            break;
+#ifndef SOLO_HACKER
+        case BootBootloader:
+            printf1(TAG_BOOT, "BootBootloader.\r\n");
+            flash_option_bytes_init(1);
+            boot_st_bootloader();
+            break;
+#endif
         default:
             return CTAP1_ERR_INVALID_COMMAND;
     }
diff --git a/targets/stm32l442/bootloader/main.c b/targets/stm32l442/bootloader/main.c
index f5aee0c..77c797c 100644
--- a/targets/stm32l442/bootloader/main.c
+++ b/targets/stm32l442/bootloader/main.c
@@ -56,6 +56,7 @@ int main(int argc, char * argv[])
 {
     uint8_t hidmsg[64];
     uint32_t t1 = 0;
+    uint32_t stboot_time = 0;
     uint32_t boot = 1;
 
     set_logging_mask(
@@ -94,6 +95,7 @@ int main(int argc, char * argv[])
     }
 
 #ifdef SOLO_HACKER
+    stboot_time = millis();
     if ( RCC->CSR & (1<<29) )// check if there was independent watchdog reset
     {
         RCC->CSR |= (1<<23); // clear reset flags
@@ -147,6 +149,17 @@ int main(int argc, char * argv[])
             delay(250);
             device_reboot();
         }
+#ifdef SOLO_HACKER
+        // Boot ST bootloader if button is held for 2s
+        if (!device_is_button_pressed())
+        {
+            stboot_time = millis();
+        }
+        if ((millis() - stboot_time) > 2000)
+        {
+            boot_st_bootloader();
+        }
+#endif
     }
 
     // Should never get here
diff --git a/targets/stm32l442/src/device.c b/targets/stm32l442/src/device.c
index 746ed37..f9c3c71 100644
--- a/targets/stm32l442/src/device.c
+++ b/targets/stm32l442/src/device.c
@@ -486,6 +486,18 @@ void ctap_overwrite_rk(int index,CTAP_residentKey * rk)
     }
 }
 
+void boot_st_bootloader()
+{
+    __disable_irq();
+
+    __set_MSP(*((uint32_t *)0x1fff0000));
+
+    ((void (*)(void)) (*((uint32_t *)0x1fff0004)))();
+
+    while(1)
+    ;
+}
+
 void boot_solo_bootloader()
 {
     LL_IWDG_Enable(IWDG);
diff --git a/tools/programmer.py b/tools/programmer.py
index 5b53492..2611d0b 100644
--- a/tools/programmer.py
+++ b/tools/programmer.py
@@ -22,9 +22,12 @@ class SoloBootloader:
     check = 0x42
     erase = 0x43
     version = 0x44
+    reboot = 0x45
+    st_dfu = 0x46
 
     HIDCommandBoot = 0x50
     HIDCommandEnterBoot = 0x51
+    HIDCommandEnterSTBoot = 0x52
 
     TAG = b'\x8C\x27\x90\xf6'
 
@@ -45,6 +48,13 @@ class Programmer():
         """ option to reboot after programming """
         self.reboot = val
 
+    def reboot(self,val):
+        """ option to reboot after programming """
+        try:
+            self.exchange(SoloBootloader.reboot)
+        except OSError:
+            pass
+
     def find_device(self,):
         dev = next(CtapHidDevice.list_devices(), None)
         if not dev:
@@ -64,6 +74,11 @@ class Programmer():
 
         return cmd + addr[:3] + SoloBootloader.TAG + length + data
 
+    def send_only_hid(self, cmd, data):
+        if type(data) != type(b''):
+            data = struct.pack('%dB' % len(data), *[ord(x) for x in data])
+        self.dev._dev.InternalSend(0x80 | cmd, bytearray(data))
+
     def send_data_hid(self, cmd, data):
         if type(data) != type(b''):
             data = struct.pack('%dB' % len(data), *[ord(x) for x in data])
@@ -121,6 +136,18 @@ class Programmer():
             self.send_data_hid(CTAPHID.INIT, '\x11\x11\x11\x11\x11\x11\x11\x11')
         self.send_data_hid(SoloBootloader.HIDCommandEnterBoot, '')
 
+    def enter_st_dfu(self,):
+        """
+        If solo is configured as solo hacker or something similar,
+        this command will tell the token to boot directly to the st DFU
+        so it can be reprogrammed.  Warning, you could brick your device.
+        """
+        if self.exchange == self.exchange_hid:
+            self.send_only_hid(SoloBootloader.HIDCommandEnterSTBoot, '')
+        else:
+            req = Programmer.format_request(SoloBootloader.st_dfu)
+            self.send_only_hid(SoloBootloader.HIDCommandBoot, req)
+
     def program_file(self,name):
 
         if name.lower().endswith('.json'):
@@ -201,12 +228,14 @@ def attempt_to_boot_bootloader(p):
 if __name__ == '__main__':
 
     parser = argparse.ArgumentParser()
-    parser.add_argument("<firmware>", help = 'firmware file.  Either a JSON or hex file.  JSON file contains signature while hex does not.')
+    parser.add_argument("[firmware]", nargs='?', default='', help = 'firmware file.  Either a JSON or hex file.  JSON file contains signature while hex does not.')
     parser.add_argument("--use-hid", action="store_true", help = 'Programs using custom HID command (default).  Quicker than using U2F authenticate which is what a browser has to use.')
     parser.add_argument("--use-u2f", action="store_true", help = 'Programs using U2F authenticate. This is what a web application will use.')
     parser.add_argument("--no-reset", action="store_true", help = 'Don\'t reset after writing firmware.  Stay in bootloader mode.')
     parser.add_argument("--reset-only", action="store_true", help = 'Don\'t write anything, try to boot without a signature.')
+    parser.add_argument("--reboot", action="store_true", help = 'Tell bootloader to reboot.')
     parser.add_argument("--enter-bootloader", action="store_true", help = 'Don\'t write anything, try to enter bootloader.  Typically only supported by Solo Hacker builds.')
+    parser.add_argument("--st-dfu", action="store_true", help = 'Don\'t write anything, try to enter ST DFU.  Warning, you could brick your Solo if you overwrite everything.  Make sure to reprogram the option bytes just to be safe.')
     args = parser.parse_args()
     print()
 
@@ -223,6 +252,15 @@ if __name__ == '__main__':
         attempt_to_boot_bootloader(p)
         sys.exit(0)
 
+    if args.reboot:
+        p.reboot()
+        sys.exit(0)
+
+    if args.st_dfu:
+        print('Sending command to boot into ST DFU...')
+        p.enter_st_dfu()
+        sys.exit(0)
+
     try:
         print('version is ', p.version())
     except CtapError as e:
@@ -234,6 +272,11 @@ if __name__ == '__main__':
         attempt_to_boot_bootloader(p)
 
     if not args.reset_only:
-        p.program_file(args.__dict__['<firmware>'])
+        fw = args.__dict__['[firmware]']
+        if fw == '':
+            print('Need to supply firmware filename.')
+            args.print_help()
+            sys.exit(1)
+        p.program_file(fw)
     else:
         p.exchange(SoloBootloader.done,0,b'A'*64)