diff --git a/tools/wptrunner/requirements_servo.txt b/tools/wptrunner/requirements_servo.txt
index 9115b7ac4e8f6a..470aaf9a93996d 100644
--- a/tools/wptrunner/requirements_servo.txt
+++ b/tools/wptrunner/requirements_servo.txt
@@ -1 +1 @@
-mozprocess == 0.26
+mozprocess==1.0.0