diff --git a/source/esp/platformio.ini b/source/esp/platformio.ini
index 9e0a352..f299f8b 100644
--- a/source/esp/platformio.ini
+++ b/source/esp/platformio.ini
@@ -9,7 +9,7 @@
 ; http://docs.platformio.org/page/projectconf.html
 
 [env:whid]
-platform = espressif8266
+platform = espressif8266@1.5.0
 board = esp12e
 framework = arduino
 upload_speed = 115200