diff --git a/PlatformIO/platformio.ini b/PlatformIO/platformio.ini
index 6d8e076..c5a5345 100644
--- a/PlatformIO/platformio.ini
+++ b/PlatformIO/platformio.ini
@@ -16,7 +16,7 @@ build_flags =
 
 [env]
 extra_scripts = pre:load_settings.py
-platform = espressif32
+platform = espressif32@4.2.0
 upload_speed = 115200
 ;upload_port = /dev/ttyUSB5
 board = esp32dev