diff --git a/include/Consts.h b/include/Consts.h
index c7593f73..a54df773 100644
--- a/include/Consts.h
+++ b/include/Consts.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#define FIRMWARE_VERSION 303
+#define FIRMWARE_VERSION 400
 
-//#define svelte
+#define svelte
 
 #ifdef esp8266_4mb
 #define FIRMWARE_NAME "esp8266_4mb"
diff --git a/platformio.ini b/platformio.ini
index 21bbf0cc..d8b8d55e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -19,7 +19,7 @@ default_envs = esp8266_4mb
 ;data_esp => esp8266_1mb , esp8266_4mb , esp32_4mb
 ;data_ms => esp8266_mysensors_4mb , esp32_mysensors_4mb
 ;data_svelte => new web interface (in progress...)
-data_dir = data_esp
+data_dir = data_svelte
 ;==============================================================================================