diff --git a/platformio.ini b/platformio.ini
index f3bbf1c..231db75 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -40,6 +40,8 @@ lib_deps =
 extra_scripts = 
 	pre:tools/compress.py
 
+debug_tool = esp-prog
+
 [env:ttgo-lora32-v21]
 board = ttgo-lora32-v21
 build_flags = -Werror -Wall -DTTGO_T_LORA32_V2_1 -DELEGANTOTA_USE_ASYNC_WEBSERVER=1