diff --git a/platformio.ini b/platformio.ini
index e713cba7..ef81d469 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -34,7 +34,8 @@ lib_ignore =
     ESPAsyncTCP
 
 [env:esp8266]
-platform = espressif8266
+;esp8266 core 2.5.2
+platform = espressif8266@2.2.0
 board = esp12e
 framework = arduino
 monitor_speed = 115200