--- a/testing/marionette/harness/marionette/__init__.py
+++ b/testing/marionette/harness/marionette/__init__.py
@@ -1,13 +1,13 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-__version__ = '2.3.0'
+__version__ = '3.0.0'
 
 from .marionette_test import (
     CommonTestCase,
     expectedFailure,
     MarionetteJSTestCase,
     MarionetteTestCase,
     skip,
     skip_if_desktop,

--- a/testing/marionette/harness/requirements.txt
+++ b/testing/marionette/harness/requirements.txt
@@ -1,9 +1,9 @@
-marionette-driver >= 1.4.0
+marionette-driver >= 2.0.0
 browsermob-proxy >= 0.6.0
 manifestparser >= 1.1
 wptserve >= 1.3.0
 mozinfo >= 0.8
 mozprocess >= 0.9
 mozrunner >= 6.9
 mozdevice >= 0.44
 mozlog >= 3.0