diff --git a/samples/dfu/ab_split/sysbuild.conf b/samples/dfu/ab_split/sysbuild.conf
index 6cb102f8437..aad143a0016 100644
--- a/samples/dfu/ab_split/sysbuild.conf
+++ b/samples/dfu/ab_split/sysbuild.conf
@@ -13,3 +13,6 @@ SB_CONFIG_MCUBOOT_SIGN_MERGED_BINARY=n
 
 # Enable manifest-based updates
 SB_CONFIG_MCUBOOT_MANIFEST_UPDATES=y
+
+# Enable HW-based rollback protection
+SB_CONFIG_MCUBOOT_HARDWARE_DOWNGRADE_PREVENTION=y
diff --git a/samples/dfu/ab_split/sysbuild/mcuboot/prj.conf b/samples/dfu/ab_split/sysbuild/mcuboot/prj.conf
index 4bbe1c8d683..e70bd707267 100644
--- a/samples/dfu/ab_split/sysbuild/mcuboot/prj.conf
+++ b/samples/dfu/ab_split/sysbuild/mcuboot/prj.conf
@@ -36,3 +36,8 @@ CONFIG_RETENTION=y
 CONFIG_BOOT_SHARE_DATA=y
 CONFIG_BOOT_SHARE_DATA_BOOTINFO=y
 CONFIG_BOOT_SHARE_BACKEND_RETENTION=y
+
+# Enable IronSide service
+CONFIG_NRF_IRONSIDE_COUNTER_SERVICE=y
+# Enable MCUboot counter implementation that uses IronSide counters
+CONFIG_NRF_MCUBOOT_IRONSIDE_COUNTERS=y
diff --git a/west.yml b/west.yml
index d6c4da6ef4d..3cb2f75ac36 100644
--- a/west.yml
+++ b/west.yml
@@ -64,7 +64,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: dc05376c170fc2739a4881629caf49c40d485a9e
+      revision: pull/3545/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above