diff --git a/sysbuild.conf b/sysbuild.conf
index 682f504..d6f1de4 100644
--- a/sysbuild.conf
+++ b/sysbuild.conf
@@ -1,4 +1,6 @@
 # nRF52840 build: no network core image.
 # Re-enable NETCORE_HCI_IPC only for nRF5340 sysbuild configurations.
 
-SB_CONFIG_BOOTLOADER_MCUBOOT=y
\ No newline at end of file
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="${APPLICATION_CONFIG_DIR}/keys/mcuboot_private.pem"
\ No newline at end of file