diff --git a/stm-firmware/updater/ram-code/main.c b/stm-firmware/updater/ram-code/main.c
index 3013e41..551d5e6 100644
--- a/stm-firmware/updater/ram-code/main.c
+++ b/stm-firmware/updater/ram-code/main.c
@@ -108,7 +108,7 @@ int write_flash_from_buffer(const char *buffer, uint32_t len, uint32_t addr)
 	}
 
 	/* Verify the write */
-	for (i = 0; i < len; i++) {
+	for (i = 0; i < len; i++, verify_ptr++) {
 		if (*verify_ptr != buffer[i]) {
 			uart_send_string("Error verifying written data!\r\n");
 			return -2;
@@ -238,6 +238,11 @@ int ram_code_main(void)
 	uart_send_string(" checked successfully.\r\n");
 	uart_send_string("Starting updater...\r\n");
 
+	/* disable the ART caches */
+	FLASH->ACR &= ~FLASH_ACR_DCEN;
+	FLASH->ACR &= ~FLASH_ACR_ICEN;
+	FLASH->ACR |= FLASH_ACR_DCRST | FLASH_ACR_ICRST;
+
 	do {
 		uart_send_string("Erasing chip...");
 		flash_writer_perform_mass_erase();