diff --git a/buildserver/provision-apt-get-install b/buildserver/provision-apt-get-install
index c6b40e5e..8702c7de 100644
--- a/buildserver/provision-apt-get-install
+++ b/buildserver/provision-apt-get-install
@@ -89,6 +89,7 @@ packages="
  python-lxml
  python-magic
  python-setuptools
+ python3-defusedxml
  python3-git/jessie-backports
  python3-gitdb/jessie-backports
  python3-gnupg