diff --git a/platformio.ini b/platformio.ini
index 9e0c28e9a..2c78a4583 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -108,7 +108,7 @@ build_flags               = ${tasmota_core_stage.build_flags}
 
 [tasmota_core_stage]
 ; *** Esp8266 core for Arduino version stable beta
-platform                  = espressif8266@2.3.3
+platform                  = espressif8266@2.4.0
 platform_packages         = framework-arduinoespressif8266 @ https://github.com/esp8266/Arduino.git#372a3ec297dfe8501bed1ec4552244695b5e8ced
 build_flags               = ${esp82xx_defaults.build_flags}
                             -DBEARSSL_SSL_BASIC