diff --git a/platformio.ini b/platformio.ini
index 182ef94..1a8dd44 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -10,7 +10,8 @@ board = m5stack-stamps3
 framework = arduino
 board_build.flash_mode = qio
 board_build.f_flash = 80000000L
-board_build.partitions = default_16MB.csv
+board_build.partitions = default_8MB.csv
+board_upload.flash_size = 8MB
 monitor_speed = 115200
 upload_speed = 1500000
 build_flags =