diff --git a/Dockerfile b/Dockerfile
index 58565f989..acb8e2a8e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM sitespeedio/webbrowsers:chrome-87.0-firefox-83.0
+FROM sitespeedio/webbrowsers:chrome-87.0-firefox-84.0
 
 ENV SITESPEED_IO_BROWSERTIME__XVFB true
 ENV SITESPEED_IO_BROWSERTIME__DOCKER true