diff --git a/taskcluster/docker/update-verify/Dockerfile b/taskcluster/docker/update-verify/Dockerfile
index 5cddeac1f0da..f055cdb3cec8 100644
--- a/taskcluster/docker/update-verify/Dockerfile
+++ b/taskcluster/docker/update-verify/Dockerfile
@@ -11,7 +11,7 @@ RUN dpkg --add-architecture i386 && apt-get -q update \
     # p7zip-full is for extracting Windows and OS X packages
     # wget is for downloading update.xml, installers, and MARs
     # libgtk-3-0 is required to run the Firefox updater
-    && apt-get -q --yes install p7zip-full wget libgtk-3-0 libgtk-3.0:i386 python3-cairo
+    && apt-get -q --yes install p7zip-full wget libgtk-3-0 libgtk-3.0:i386 python3-cairo zip
 
 VOLUME /builds/worker/.cache
 VOLUME /builds/worker/checkouts