diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index e2116c7..cdf127f 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -260,6 +260,13 @@
 	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
 	select VBOOT_X86_SHA256_ACCELERATION
 
+# Default hash block size is 1KiB. Increasing it to 4KiB to improve
+# hashing time as well as read time. This helps in improving
+# boot time for Alder Lake.
+config VBOOT_HASH_BLOCK_SIZE
+	hex
+	default 0x1000
+
 config CBFS_SIZE
 	default 0x200000