diff --git a/src/krux/firmware.py b/src/krux/firmware.py
index 4adfe7ff3..83bef0303 100644
--- a/src/krux/firmware.py
+++ b/src/krux/firmware.py
@@ -44,7 +44,7 @@
 MAIN_BOOT_CONFIG_SECTOR_ADDRESS = 0x00004000
 BACKUP_BOOT_CONFIG_SECTOR_ADDRESS = 0x00005000
 
-ERASE_BLOCK_SIZE = 0x10000
+ERASE_BLOCK_SIZE = 0x1000
 
 FLASH_IO_WAIT_TIME = 100