diff --git a/lib_xua/lib_xua/src/dfu/flash_interface.c b/lib_xua/lib_xua/src/dfu/flash_interface.c
index c42020f..1bb24e5 100644
--- a/lib_xua/lib_xua/src/dfu/flash_interface.c
+++ b/lib_xua/lib_xua/src/dfu/flash_interface.c
@@ -23,7 +23,7 @@
  */
 #ifndef FLASH_MAX_UPGRADE_SIZE
 //#define FLASH_MAX_UPGRADE_SIZE (512 * 1024)
-#define FLASH_MAX_UPGRADE_SIZE (2800 * 1024)
+#define FLASH_MAX_UPGRADE_SIZE (3000 * 1024)
 #endif
 
 #define FLASH_ERROR() do {} while(0)
diff --git a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/dfu_upgrade.h b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/dfu_upgrade.h
index 977c284..6a80ac0 100644
--- a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/dfu_upgrade.h
+++ b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/dfu_upgrade.h
@@ -46,7 +46,7 @@ typedef enum {
 #define MAX_DATA_BLOCK_SIZE         57      // 最大数据块大小（63字节HID数据包 - 5字节头部 - 1字节Checksum）
 
 #ifndef DFU_FLASH_MAX_UPGRADE_SIZE
-#define DFU_FLASH_MAX_UPGRADE_SIZE (3200 * 1024)
+#define DFU_FLASH_MAX_UPGRADE_SIZE (3000 * 1024)
 #endif