diff --git a/package.json b/package.json
index f1881e45c..20bad37f5 100644
--- a/package.json
+++ b/package.json
@@ -2,5 +2,5 @@
     "name": "framework-arduinoespressif8266",
     "description": "Arduino Wiring-based Framework (ESP8266 Core)",
     "url": "https://github.com/esp8266/Arduino",
-    "version": "2.7.1"
+    "version": "3.0.0-dev"
 }
diff --git a/platform.txt b/platform.txt
index 401ab558d..751d9c9b5 100644
--- a/platform.txt
+++ b/platform.txt
@@ -5,8 +5,8 @@
 # For more info:
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification
 
-name=ESP8266 Boards (2.7.1)
-version=2.7.1
+name=ESP8266 Boards (3.0.0-dev)
+version=3.0.0-dev
 
 # These will be removed by the packager script when doing a JSON release
 runtime.tools.xtensa-lx106-elf-gcc.path={runtime.platform.path}/tools/xtensa-lx106-elf