diff --git a/HISTORY.rst b/HISTORY.rst
index fba1bf03..ebacf134 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,7 +6,7 @@ Release Notes
 PlatformIO Core 4
 -----------------
 
-4.2.2 (2020-??-??)
+4.3.0 (2020-??-??)
 ~~~~~~~~~~~~~~~~~~
 
 * Control device monitor output with `filters and text transformations <https://docs.platformio.org/page/userguide/device/cmd_monitor.html#cmd-device-monitor-filters>`__
diff --git a/platformio/__init__.py b/platformio/__init__.py
index b767891d..2488ec09 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION = (4, 2, "2b1")
+VERSION = (4, 3, "0b1")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"