diff --git a/platformio.ini b/platformio.ini
index 03d8335..23a1015 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -35,12 +35,24 @@ build_flags =
 ;  Flash : 4 MB QIO  /  PSRAM : none
 ; ─────────────────────────────────────────
 [env:esp32s3_zero]
-board = waveshare_esp32_s3_zero
+board                           = esp32-s3-devkitm-1
+board_build.flash_mode          = qio
+board_build.arduino.memory_type = qio_qspi
+
 ; Partition scheme with LittleFS  (default_8MB has ota+littlefs)
 board_build.partitions = default.csv
 upload_speed   = 921600
 monitor_speed  = 115200
 
+board_upload.flash_size         = 4MB
+board_build.arduino.flash_size  = 4MB
+
+build_flags =
+    ${env.build_flags}
+    -DBOARD_HAS_PSRAM
+    -DBOARD_ESP32S3_ZERO
+    -mfix-esp32-psram-cache-issue
+
 ; ─────────────────────────────────────────
 ;  Generic ESP32-S3 N16R8V
 ;  Flash : 16 MB QIO  /  PSRAM : 8 MB OPI
@@ -55,3 +67,4 @@ monitor_speed = 115200
 build_flags =
     ${env.build_flags}
     -DBOARD_HAS_PSRAM
+    -mfix-esp32-psram-cache-issue