diff --git a/samples/sid_end_device/pm_static_nrf54l15dk_nrf54l10_cpuapp.yml b/samples/sid_end_device/pm_static_nrf54l15dk_nrf54l10_cpuapp.yml
index ada6b15df..fd8801cfd 100644
--- a/samples/sid_end_device/pm_static_nrf54l15dk_nrf54l10_cpuapp.yml
+++ b/samples/sid_end_device/pm_static_nrf54l15dk_nrf54l10_cpuapp.yml
@@ -1,40 +1,40 @@
 app:
-  address: 0xc800
+  address: 0xd800
   end_address: 0xfd000
   region: flash_primary
-  size: 0xf0800
+  size: 0xef800
 mcuboot:
   address: 0x0
-  end_address: 0xc000
+  end_address: 0xd000
   placement:
     before:
     - mcuboot_primary
   region: flash_primary
-  size: 0xc000
+  size: 0xd000
 mcuboot_pad:
-  address: 0xc000
-  end_address: 0xc800
+  address: 0xd000
+  end_address: 0xd800
   placement:
     before:
     - mcuboot_primary_app
   region: flash_primary
   size: 0x800
 mcuboot_primary:
-  address: 0xc000
+  address: 0xd000
   end_address: 0xfd000
   orig_span: &id001
   - mcuboot_pad
   - app
   region: flash_primary
-  size: 0xf1000
+  size: 0xf0000
   span: *id001
 mcuboot_primary_app:
-  address: 0xc800
+  address: 0xd800
   end_address: 0xfd000
   orig_span: &id002
   - app
   region: flash_primary
-  size: 0xf0800
+  size: 0xef800
   span: *id002
 settings_storage:
   address: 0xfd000
@@ -53,11 +53,11 @@ mfg_storage:
   size: 0x1000
 mcuboot_secondary:
   address: 0x0
-  end_address: 0xf1000
+  end_address: 0xf0000
   placement:
     align:
       start: 0x4
   region: external_flash
   share_size:
   - mcuboot_primary
-  size: 0xf1000
+  size: 0xf0000
diff --git a/samples/sid_end_device/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l10_cpuapp.conf b/samples/sid_end_device/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l10_cpuapp.conf
index 9f6d267f4..5818fd966 100644
--- a/samples/sid_end_device/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l10_cpuapp.conf
+++ b/samples/sid_end_device/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l10_cpuapp.conf
@@ -21,14 +21,17 @@ CONFIG_TICKLESS_KERNEL=y
 
 CONFIG_BOOT_WATCHDOG_FEED=n
 
-CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK=y
-
 # nRF54L15DK uses SPI NOR external flash
 CONFIG_GPIO=y
 CONFIG_SPI=y
 CONFIG_SPI_NOR=y
 CONFIG_SPI_NOR_SFDP_DEVICETREE=y
 CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096
+CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK=y
 
 # required by SPI driver
 CONFIG_MULTITHREADING=y
+
+# Activate LTO
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
diff --git a/samples/sid_end_device/sysbuild/mcuboot/prj.conf b/samples/sid_end_device/sysbuild/mcuboot/prj.conf
index 7c92c668c..f2bd8b411 100644
--- a/samples/sid_end_device/sysbuild/mcuboot/prj.conf
+++ b/samples/sid_end_device/sysbuild/mcuboot/prj.conf
@@ -42,3 +42,4 @@ CONFIG_MULTITHREADING=n
 CONFIG_TICKLESS_KERNEL=n
 CONFIG_TIMEOUT_64BIT=n
 CONFIG_NRF_ENABLE_ICACHE=n
+CONFIG_SIZE_OPTIMIZATIONS=y