diff --git a/testing/marionette/client/marionette_driver/__init__.py b/testing/marionette/client/marionette_driver/__init__.py
index 3fa659b1b5d6..02c9970c09f9 100644
--- a/testing/marionette/client/marionette_driver/__init__.py
+++ b/testing/marionette/client/marionette_driver/__init__.py
@@ -2,7 +2,7 @@
 # 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__ = '2.4.0'
 
 from marionette_driver import (
     addons,
diff --git a/testing/marionette/harness/marionette_harness/__init__.py b/testing/marionette/harness/marionette_harness/__init__.py
index 4a4c0970069d..14ad77fb95b2 100644
--- a/testing/marionette/harness/marionette_harness/__init__.py
+++ b/testing/marionette/harness/marionette_harness/__init__.py
@@ -2,7 +2,7 @@
 # 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__ = '4.1.0'
+__version__ = '4.2.0'
 
 from .marionette_test import (
     CommonTestCase,
diff --git a/testing/marionette/harness/requirements.txt b/testing/marionette/harness/requirements.txt
index 12863240095f..a5725c7ea4c9 100644
--- a/testing/marionette/harness/requirements.txt
+++ b/testing/marionette/harness/requirements.txt
@@ -1,6 +1,6 @@
 browsermob-proxy >= 0.6.0
 manifestparser >= 1.1
-marionette-driver >= 2.3.0
+marionette-driver >= 2.4.0
 mozcrash >= 0.5
 mozdevice >= 0.44
 mozinfo >= 0.8