diff --git a/.github/workflows/compile.yml b/.github/workflows/compile.yml
index 2d8d87e..8a6099d 100644
--- a/.github/workflows/compile.yml
+++ b/.github/workflows/compile.yml
@@ -14,6 +14,8 @@ jobs:
         mbed_target: 
           # Change the below to match the target(s) you want to compile the project for.
           - K64F
+          - MIMXRT1060_EVK
+          - NUCLEO_H743ZI2
     
     steps:
       - name: Checkout
@@ -36,5 +38,5 @@ jobs:
       - name: Build project for ${{ matrix.mbed_target }}
         run: |
             mkdir build && cd build
-            cmake .. -GNinja -DMBED_TARGET=${{ matrix.mbed_target }} -DMCUBOOT_SIGNING_KEY=signing-keys.pem
+            cmake .. -GNinja -DMBED_TARGET=${{ matrix.mbed_target }} -DUPLOAD_METHOD=NONE -DMCUBOOT_SIGNING_KEY=signing-keys.pem
             ninja
diff --git a/SimpleApp.cpp b/SimpleApp.cpp
index 5a1f321..382e1e4 100644
--- a/SimpleApp.cpp
+++ b/SimpleApp.cpp
@@ -26,7 +26,10 @@ int main()
     mbed_trace_include_filters_set("SimpleApp,MCUb,BL");
 
     DigitalIn btn(DEMO_BUTTON);
+
+#ifdef LED1
     DigitalOut led(LED1);
+#endif
 
     // Check if an update has been performed
     int swap_type = boot_swap_type();
@@ -60,7 +63,6 @@ int main()
             if (ret == 0)
             {
                 tr_info("Current firmware set as confirmed");
-                return 0;
             }
             else
             {
@@ -81,6 +83,8 @@ int main()
     {
         ThisThread::sleep_for(1s);
         printf("Simple app is running...\n");
+
+#ifdef LED1
         led = 1;
         ThisThread::sleep_for(250ms);
         led = 0;
@@ -88,5 +92,6 @@ int main()
         led = 1;
         ThisThread::sleep_for(250ms);
         led = 0;
+#endif
     }
 }
\ No newline at end of file
diff --git a/UpdaterApp.cpp b/UpdaterApp.cpp
index 6ede64b..7194be3 100644
--- a/UpdaterApp.cpp
+++ b/UpdaterApp.cpp
@@ -45,6 +45,17 @@ int main()
         tr_error("Cannot init secondary BlockDevice: %d", ret);
     }
 
+    tr_info(" ");
+    tr_info("mcuboot configuration: -----------------------------------");
+    tr_info("- Primary slot: start address 0x%x, size %ukiB", MCUBOOT_PRIMARY_SLOT_START_ADDR, MCUBOOT_SLOT_SIZE/1024);
+    tr_info("  - Header size: 0x%x", MCUBOOT_HEADER_SIZE);
+    tr_info("  - Max flash sectors per slot: %u", MCUBOOT_MAX_IMG_SECTORS);
+    tr_info("- Scratch area: start address 0x%x, size %ukiB", MCUBOOT_SCRATCH_START_ADDR, MCUBOOT_SCRATCH_SIZE/1024);
+    tr_info("- Secondary BD: size %" PRIu64 "kiB", secondary_bd->size()/1024);
+    tr_info("  - Program (block) size %" PRIu64 " bytes", secondary_bd->get_program_size());
+    tr_info("  - Erase (sector) size %" PRIu64 " bytes", secondary_bd->get_erase_size());
+    tr_info(" ");
+
     // Erase secondary slot
     // On the first boot, the secondary BlockDevice needs to be clean
     // If the first boot is not normal, please run the erase step, then reboot
@@ -80,7 +91,12 @@ int main()
     }
 
     // Copy the update image from internal flash to secondary BlockDevice
-    secondary_bd->program(&_binary_SimpleApp_update_image_bin_start, 0, SimpleApp_update_image_bin_length);
+    ret = secondary_bd->program(&_binary_SimpleApp_update_image_bin_start, 0, SimpleApp_update_image_bin_length);
+    if (ret == 0) {
+        tr_info("Image copied.");
+    } else {
+        tr_error("Cannot copy image: %d", ret);
+    }
 
     ret = secondary_bd->deinit();
     if (ret == 0) {
@@ -89,6 +105,9 @@ int main()
         tr_error("Cannot deinit secondary BlockDevice: %d", ret);
     }
 
+    // Give user time to react, as programming can be pretty fast
+    ThisThread::sleep_for(250ms);
+
     // Activate the image in the secondary BlockDevice
     tr_info("> Image copied to secondary BlockDevice, press button to activate");
 
diff --git a/mbed-os b/mbed-os
index b49e4f3..25b05a1 160000
--- a/mbed-os
+++ b/mbed-os
@@ -1 +1 @@
-Subproject commit b49e4f3d14f7ba344ef5afe4523495f95e90d746
+Subproject commit 25b05a10ec8e1ce25318817587bc77a9cca61418
diff --git a/mbed_app.json5 b/mbed_app.json5
index 7fc15db..d570019 100644
--- a/mbed_app.json5
+++ b/mbed_app.json5
@@ -10,12 +10,16 @@
             "macro_name": "DEMO_BUTTON_ACTIVE_LOW",
             "required": false
         },
+        "secondary-slot-in-flash": {
+            "help": "If enabled, store the secondary slot in the application flash immediately after the primary slot.",
+            "value": false
+        },
+        "secondary-slot-flash-start-addr": {
+            "help": "If secondary-slot-in-flash is enabled, this sets the start address of the secondary slot.",
+            "value": null
+        }
     },
 
-    "macros": [
-        "MBEDTLS_CIPHER_MODE_CTR"
-    ],
-
     "target_overrides": {
         "*": {
             "mcuboot.bootloader-build": 0,
@@ -81,8 +85,61 @@
             "mcuboot.scratch-address": "0xE0000",
             "mcuboot.scratch-size": "0x20000",
 
-            "mcuboot.max-img-sectors": "0x180",
+            "mcuboot.max-img-sectors": "1536", // External SD card has smaller sector size, so divide slot size by read granularity
             "mcuboot.read-granularity": 512 // External SD card used as block device, this is its read size.
+        },
+
+        "MIMXRT1060_EVK": {
+            "target.memory_bank_config": {
+                "EXT_FLASH": {
+                    "start": 0x60021000, // mcuboot.primary-slot-address + mcuboot.header-size
+                    "size": 0x2FF000 // mcuboot.slot-size - mcuboot.header-size
+                }
+            },
+
+            // Primary slot is 3MiB and begins right after the bootloader
+            "mcuboot.primary-slot-address": "0x60020000",
+            "mcuboot.slot-size": "0x300000",
+
+            // Use flash for secondary slot as well
+            "secondary-slot-in-flash": true,
+            "secondary-slot-flash-start-addr": "0x60320000",
+
+            // Store the scratch space at the end of flash
+            "mcuboot.scratch-address": "0x60620000",
+            "mcuboot.scratch-size": "0x20000",
+
+            "mcuboot.read-granularity": 1, // Flash is byte addressable
+
+            "mcuboot.max-img-sectors": 768, // Maximum flash sectors per slot. 3MiB/4kiB = 768.
+            "mcuboot.flash-block-size": 256,
+
+            "demo-button-active-low": true
+        },
+
+        "MCU_STM32H743xI": {
+            "target.memory_bank_config": {
+                "IROM1": {
+                    "start": 0x08021000, // mcuboot.primary-slot-address + mcuboot.header-size
+                    "size": 0xDF000 // mcuboot.slot-size - mcuboot.header-size
+                }
+            },
+
+            // Since STM32H743 boards have no external block device, keep everything in the MCU flash.
+            "app.secondary-slot-in-flash": true,
+            "app.secondary-slot-flash-start-addr": "0x08100000",
+
+            // Slot size can be as big as 896k, since we need to reserve the first flash sector for the bootloader
+            // and the last flash sector for scratch space
+            "mcuboot.primary-slot-address": "0x08020000",
+            "mcuboot.max-img-sectors": "7", // 7 flash sectors per slot
+            "mcuboot.slot-size": "0xE0000",
+            "mcuboot.flash-block-size": 32, // Flash program size is 32
+
+            // STM32H7 flash sector size is 128k, so we need to make the scratch region at least that big
+            "mcuboot.scratch-address": "0x081E0000",
+            "mcuboot.scratch-size": "0x20000"
+
         }
-    }
+    },
 }
diff --git a/mcuboot b/mcuboot
index ce340d5..2894851 160000
--- a/mcuboot
+++ b/mcuboot
@@ -1 +1 @@
-Subproject commit ce340d5722ee4898137a1e8106988399db20bc53
+Subproject commit 289485156355d4373735534b11baa7ab50a9d6c6
diff --git a/secondary_bd.cpp b/secondary_bd.cpp
index 38e78be..81d4298 100644
--- a/secondary_bd.cpp
+++ b/secondary_bd.cpp
@@ -1,5 +1,5 @@
 /*
- * default_bd.cpp
+* default_bd.cpp
  *
  *  Created on: Jul 30, 2020
  *      Author: gdbeckstein
@@ -15,9 +15,13 @@
 
 mbed::BlockDevice* get_secondary_bd(void) {
 
-    // Use a section of FlashIAP immediately after the secondary slot
-    static FlashIAPBlockDevice flashBD(MCUBOOT_PRIMARY_SLOT_START_ADDR + MCUBOOT_SLOT_SIZE, MCUBOOT_SLOT_SIZE);
-    return &flashBD;
+    // Use FlashIAP for the secondary BD.
+    static FlashIAPBlockDevice flashBD(MBED_CONF_APP_SECONDARY_SLOT_FLASH_START_ADDR, MCUBOOT_SLOT_SIZE);
+
+    // Our UpdaterApp needs to be able to program the flash with single-byte granularity
+    static mbed::BufferedBlockDevice bufferedBD(&flashBD);
+
+    return &bufferedBD;
 }
 
 #else
@@ -33,7 +37,7 @@ mbed::BlockDevice* get_secondary_bd(void) {
     // Otherwise it will return the flash IAP block device.
     mbed::BlockDevice* default_bd = mbed::BlockDevice::get_default_instance();
 
-    // If this assert fails, there is no block def
+    // If this assert fails, there is no default block device defined for your board.
     MBED_ASSERT(default_bd != nullptr);
 
     // mcuboot assumes that the read size of the secondary block device is the same as the read size