diff --git a/tools/wptrunner/requirements_firefox.txt b/tools/wptrunner/requirements_firefox.txt
index 222c91622d2204..1f9033c09fe8db 100644
--- a/tools/wptrunner/requirements_firefox.txt
+++ b/tools/wptrunner/requirements_firefox.txt
@@ -1,6 +1,6 @@
 marionette_driver==3.1.0
 mozcrash==2.1.0
-mozdevice==4.0.3
+mozdevice==4.1.0
 mozinstall==2.0.1
 mozleak==0.2
 mozprofile==2.5.0